gtkglsink: expose the created display and context correctly

1. Propagate the GstGLDisplay we create
2. Add the created GstGLContext to the propagated GstGLDisplay

Otherwise with multi-branch GL pipelines involving gtkglsink, things
will fall apart and errors will be genarated somewhere.
2 files changed
tree: 8e209f024efc758d1136852cbeea59099c492192
  1. ext/
  2. tests/