avformat/mov: don't return the latest stream when an item stream is expected
Otherwise, things like ICC profiles as read from the colr box meant for an item
with no stream (like a grid) may end up being added to the wrong stream.
Signed-off-by: James Almer <jamrial@gmail.com>
(cherry picked from commit
04182b55494b44152146e6a6bcd5eb9403f00625)
Gbp-Pq: Name 0001-avformat-mov-don-t-return-the-latest-stream-when-an-.patch