Jan Schmidt edd5911249 gl/cocoa: Return a strong ref to the parent GstGLContext
If the GstGLCAOpenGLLayer was initialized via a parent
context, make sure to ref the context before returning it
from getGLContext as all callers will unref it.

Follow up to !3729

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3881>
2023-02-02 13:53:07 +00:00
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