Add some missing nullable annotations

35 jobs for !678 with nullable in 46 seconds (queued for 6 seconds)
detached
Status Job ID Name Coverage
  Build Docker
passed #5058865
alpine amd64 manifest builder docker

00:00:11

passed #5058864
android docker

00:00:31

passed #5058862
cerbero fedora amd64 docker

00:00:11

passed #5058860
fedora amd64 docker

00:00:11

passed #5058867
gst-indent amd64 docker

00:00:10

 
  Preparation
passed #5058870
gst indent

00:00:15

manual #5058869
manual
manifest
 
  Build
created #5058882
gstreamer
build cerbero cross-android universal
created #5058886
gst-ios-13.2
build cerbero cross-ios universal
created #5058883
gstreamer
build cerbero cross win32
created #5058884
gstreamer
build cerbero cross win64
created #5058881
gstreamer
build cerbero fedora x86_64
created #5058885
gst-macos-10.15
build cerbero macos x86_64
created #5058887
1809 gstreamer-windows windows docker
build cerbero msvc x86_64
created #5058877
build clang fedora x86_64
created #5058880
1809 windows docker allowed to fail manual
build msys2
created #5058872
build nodebug fedora x86_64
created #5058874
build static fedora x86_64
created #5058876
build static nodebug fedora x86_64
created #5058878
1809 windows docker
build vs2017 amd64
created #5058879
1809 windows docker
build vs2017 x86
 
  Test
created #5058888
gstreamer
check fedora
created #5058889
gstreamer
integration testsuites fedora 1/4
created #5058890
gstreamer
integration testsuites fedora 2/4
created #5058891
gstreamer
integration testsuites fedora 3/4
created #5058892
gstreamer
integration testsuites fedora 4/4
created #5058897
gstreamer
valgrind bad
created #5058894
gstreamer
valgrind base
created #5058893
gstreamer
valgrind core
created #5058898
gstreamer
valgrind ges
created #5058895
gstreamer
valgrind good
created #5058896
gstreamer
valgrind ugly
 
  Integrate
created #5058899
cross-android universal examples
created #5058901
gst-ios-13.2
cross-ios universal examples
created #5058900
documentation