Backport of "glcolorconvert: update existing sync meta if outbuf has one" into 1.24
requested to merge gstreamer-backport-bot/gstreamer:mr-6942-backport-into-1.24-glcolorconvert-syncmeta into 1.24
Backport of !6942 (merged) "glcolorconvert: update existing sync meta if outbuf has one".
Commits:
- 859b1c8b glcolorconvert: update existing sync meta if outbuf has one