Backport of "videoscale: fix valid_tags NULL-terminated array of strings" into 1.20
Backport of !3603 (merged) "videoconvertscale: fix valid_tags NULL-terminated array of strings".
Todo:
-
Needs manual intervention, cherry-picking failed!
Commits:
- 2a602afe videoconvertscale: fix valid_tags NULL-terminated array of strings