Backport of "videoaggregator: fix bufferpool leak" into 1.22
requested to merge tpm/gstreamer:mr-6025-backport-into-1.22-videoaggregator-fix-bufferpool-leak into 1.22
Backport of !6025 (merged) "videoaggregator: fix bufferpool leak".
Commits:
- 2d7d9f35 videoaggregator: fix bufferpool leak