Merge commit 'd7c450436fcb9d3ecf59884a574e7684183e753d'

* commit 'd7c450436fcb9d3ecf59884a574e7684183e753d':
  ac3dec: validate channel output mode against channel count

Conflicts:
	libavcodec/ac3dec.c

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

diff --cc libavcodec/ac3dec.c
Simple merge