glsl/nir: fix invalid C++ designated initialiser

Fixes: 83fd1e58 ("glsl/nir: Add and use a gl_nir_link() function")
Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
23 jobs for !1938 with glsl-nir-fix in 53 minutes and 53 seconds (queued for 16 minutes and 40 seconds)
detached
Status Job ID Name Coverage
  Containers Build
passed debian #594238

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  Build+Test
passed meson-arm64 #594247

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passed meson-armhf #594246

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passed meson-clang #594241

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passed meson-clover #594244

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passed meson-i386 #594248

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passed meson-main #594239

00:10:39

passed meson-swr-glvnd #594240

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passed meson-vulkan #594245

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passed scons-llvm #594250

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passed scons-nollvm #594249

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passed scons-swr #594242

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passed scons-win64 #594243

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  Test
passed test-llvmpipe-gles2 1/4 #594251

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passed test-llvmpipe-gles2 2/4 #594252

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passed test-llvmpipe-gles2 3/4 #594253

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passed test-llvmpipe-gles2 4/4 #594254

00:04:07

passed test-softpipe-gles2 1/4 #594255

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passed test-softpipe-gles2 2/4 #594256

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passed test-softpipe-gles2 3/4 #594257

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passed test-softpipe-gles2 4/4 #594258

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passed test-softpipe-gles3-limited #594259

00:05:38

 
  External
passed continuous-integration/appveyor/branch