Backport of "aggregator: Actually handle NEED_DATA return from update_src_caps()" into 1.16
requested to merge tpm/gstreamer:backport-mr-249-into-1.16-aggregator-update-src-caps-need-more-data into 1.16
Backport of !249 (merged) "aggregator: Actually handle NEED_DATA return from update_src_caps()".
Commits:
- e0249266 aggregator: Actually handle NEED_DATA return from update_src_caps()