glx: init __GLXvendorInfo to NULL

Since 01ba8a8d the dd variable isn't necessarly initialized,
so the compiler complains:

   warning: ‘dd’ may be used uninitialized in this function

Initialize dd to NULL to fix this.

Fixes: 01ba8a8d ("glx: Implement GLX_EXT_no_config_context")
126 jobs for !10519 with fix_glx_glvnd_warning in 16 seconds (queued for 7 seconds)
latest detached
Status Job ID Name Coverage
  Sanity
passed #9311024
sanity

00:00:16

 
  Container
manual #9311027
aarch64 manual
arm_build
manual #9311028
mesa windows shell 1809 manual
windows_build_vs2019
manual #9311025
manual
x86_build-base
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manual
x86_test-base
 
  Container 2
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android_build
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i386_build
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kernel+rootfs_amd64
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aarch64
kernel+rootfs_arm64
created #9311038
aarch64
kernel+rootfs_armhf
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ppc64el_build
created #9311032
s390x_build
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x86_build
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x86_test-gl
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x86_test-vk
 
  Meson X86 64
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meson-clang
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meson-clover
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meson-clover-testing
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meson-gallium
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meson-release
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meson-testing
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meson-testing-asan
created #9311046
meson-vulkan
 
  Build Misc
created #9311047
arm_test
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meson-android
created #9311050
aarch64
meson-arm64
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aarch64
meson-arm64-asan
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aarch64
meson-arm64-build-test
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aarch64
meson-armhf
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meson-i386
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meson-mingw32-x86_64
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meson-ppc64el
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kvm
meson-s390x
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windows docker 1809 mesa
meson-windows-vs2019
 
  Amd
created #9311059
mesa-ci-aarch64-lava-collabora
radeonsi-stoney-gles2:amd64
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mesa-ci-aarch64-lava-collabora
radeonsi-stoney-gles31:amd64 1/2
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mesa-ci-aarch64-lava-collabora
radeonsi-stoney-gles31:amd64 2/2
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mesa-ci-aarch64-lava-collabora
radeonsi-stoney-gles3:amd64 1/2
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mesa-ci-aarch64-lava-collabora
radeonsi-stoney-gles3:amd64 2/2
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mesa-ci-aarch64-lava-collabora
radeonsi-stoney-piglit-gl:amd64
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mesa-ci-aarch64-lava-collabora
radeonsi-stoney-traces:amd64
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radv-fossils
 
  Arm
created #9311074
mesa-ci-aarch64-lava-collabora
panfrost-g52-gles2:arm64
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mesa-ci-aarch64-lava-collabora
panfrost-g52-gles31:arm64
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mesa-ci-aarch64-lava-collabora
panfrost-g52-gles3:arm64
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mesa-ci-aarch64-lava-collabora
panfrost-t720-gles2:arm64
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mesa-ci-aarch64-lava-collabora
panfrost-t760-gles2:armhf
created #9311068
mesa-ci-aarch64-lava-collabora
panfrost-t760-traces:armhf
created #9311069
mesa-ci-aarch64-lava-collabora
panfrost-t860-gles2:arm64
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mesa-ci-aarch64-lava-collabora
panfrost-t860-gles31:arm64
created #9311070
mesa-ci-aarch64-lava-collabora
panfrost-t860-gles3:arm64 1/2
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mesa-ci-aarch64-lava-collabora
panfrost-t860-gles3:arm64 2/2
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mesa-ci-aarch64-lava-collabora
panfrost-t860-traces:arm64
 
  Broadcom
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igalia-rpi4
v3d-rpi4-gles2:armhf
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igalia-rpi4
v3d-rpi4-gles31:armhf 1/2
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igalia-rpi4
v3d-rpi4-gles31:armhf 2/2
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igalia-rpi4
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igalia-rpi4
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igalia-rpi4
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igalia-rpi4
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igalia-rpi4
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igalia-rpi4
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igalia-rpi4
v3dv-rpi4-vk:armhf 3/6
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igalia-rpi4
v3dv-rpi4-vk:armhf 4/6
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igalia-rpi4
v3dv-rpi4-vk:armhf 5/6
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igalia-rpi4
v3dv-rpi4-vk:armhf 6/6
created #9311077
igalia-rpi3
vc4-rpi3-gles2:armhf 1/4
created #9311078
igalia-rpi3
vc4-rpi3-gles2:armhf 2/4
created #9311079
igalia-rpi3
vc4-rpi3-gles2:armhf 3/4
created #9311080
igalia-rpi3
vc4-rpi3-gles2:armhf 4/4
 
  Freedreno
created #9311094
google-freedreno-db410c
a306_gles2
created #9311095
google-freedreno-db410c
a306_gles3 1/3
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google-freedreno-db410c
a306_gles3 2/3
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google-freedreno-db410c
a306_gles3 3/3
created #9311098
google-freedreno-db410c
a306_gles3_options
created #9311099
google-freedreno-db410c
a306-traces
created #9311100
google-freedreno-db820c
a530_gles2
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google-freedreno-db820c
a530_gles31 1/2
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google-freedreno-db820c
a530_gles3 1/2
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google-freedreno-db820c
a530_gles31 2/2
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google-freedreno-db820c
a530_gles3 2/2
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google-freedreno-db820c
a530_piglit_gl
created #9311106
google-freedreno-db820c
a530_piglit_shader
created #9311107
google-freedreno-db820c
a530-traces
created #9311112
google-freedreno-cheza
a630_egl
created #9311111
google-freedreno-cheza
a630_gl
created #9311108
google-freedreno-cheza
a630_gles2
created #9311110
google-freedreno-cheza
a630_gles3
created #9311109
google-freedreno-cheza
a630_gles31
created #9311113
google-freedreno-cheza
a630_gles_others
created #9311117
google-freedreno-cheza
a630_piglit
created #9311118
google-freedreno-cheza
a630-traces
created #9311114
google-freedreno-cheza
a630_vk 1/2
created #9311115
google-freedreno-cheza
a630_vk 2/2
created #9311116
google-freedreno-cheza
a630_vk_sysmem
 
  Software Renderer
created #9311136
lavapipe-vk
created #9311125
llvmpipe-egl
created #9311123
llvmpipe-gles2
created #9311124
llvmpipe-khr-gles2
created #9311120
llvmpipe-piglit-glslparser
created #9311119
llvmpipe-piglit-quick_gl
created #9311121
llvmpipe-piglit-quick_shader
created #9311122
llvmpipe-traces
created #9311133
softpipe-asan-gles31
created #9311135
softpipe-gl
created #9311126
softpipe-gles2
created #9311127
softpipe-gles3
created #9311128
softpipe-gles31 1/2
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softpipe-gles31 2/2
created #9311130
softpipe-khr-gles2
created #9311131
softpipe-khr-gles3
created #9311132
softpipe-khr-gles31
created #9311134
softpipe-piglit-quick
 
  Layered Backends
created #9311149
windows docker 1809 mesa
test-d3d12-windows
created #9311141
virgl-gl30-on-gl
created #9311142
virgl-gl31-on-gl
created #9311143
virgl-gl32-on-gl
created #9311137
virgl-gles2-on-gl
created #9311139
virgl-gles31-on-gl 1/2
created #9311140
virgl-gles31-on-gl 2/2
created #9311138
virgl-gles3-on-gl
created #9311144
virgl-traces
created #9311148
zink-lvp-gl
created #9311146
zink-lvp-gles2
created #9311147
zink-lvp-gles3
created #9311145
zink-piglit-quick_gl