Backport of "glfilter: Only add parent meta if inbuf != outbuf" into 1.22
requested to merge tpm/gstreamer:mr-5445-backport-into-1.22-glfilter-transform-memory-leak into 1.22
Backport of !5445 (merged) "glfilter: Only add parent meta if inbuf != outbuf".
Commits:
- 64a58c37 glfilter: Only add parent meta if inbuf != outbuf