Backport of "glimagesink: only allow setting the GL display/context if it is a valid value" into 1.20
requested to merge tpm/gstreamer:backport-mr-2750-into-1.20-glimagesink-application-context into 1.20
Backport of !2750 (merged) "glimagesink: only allow setting the GL display/context if it is a valid value".
Commits:
- 390518a2 glimagesink: only allow setting the GL display/context if it is a valid value