Fixes out of array access
Fixes: poc.mp4
Found-by: GwanYeong Kim <gy741.kim@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit c6939f65)
(cherry picked from commit 3f621455)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>