Merge commit 'ed9b2a51'

* commit 'ed9b2a51':
  mov: Rework the check for invalid indexes in stsc

This commit is a noop, see 3c058f57.

The proposed fix breaks seeking in multiple_stsd.mp4 (ticket #3962) and
playback of wwwq_cut.mp4 (ticket #2991).
Merged-by: Matthieu Bouron <matthieu.bouron@gmail.com>