Merge commit '9eef9eb3014b2ed9c3ff4aac510a9f04edb555cf'

Merge commit '9eef9eb3014b2ed9c3ff4aac510a9f04edb555cf'

* commit '9eef9eb3014b2ed9c3ff4aac510a9f04edb555cf':
  h264: check that execute_decode_slices() is not called too many times

Conflicts:
	libavcodec/h264.c

The check is replaced by an assert() as the mb index should not ever go out
of bounds.

Merged-by: Michael Niedermayer <michaelni@gmx.at>