* qatar/release/0.7:
  Update RELEASE file for 0.7.6
  Update changelog for 0.7.6 release
  ea: check chunk_size for validity.
  png: check bit depth for PAL8/Y400A pixel formats.
  x86: fix build with gcc 4.7
  qdm2: clip array indices returned by qdm2_get_vlc().
  kmvc: Check palsize.
  aacsbr: prevent out of bounds memcpy().
  rtpdec_asf: Fix integer underflow that could allow remote code execution
  dpcm: ignore extra unpaired bytes in stereo streams.
  tqi: Pass errors from the MB decoder
  h264: Add check for invalid chroma_format_idc
  adpcm: ADPCM Electronic Arts has always two channels
  h263dec: Disallow width/height changing with frame threads.
  vqavideo: return error if image size is not a multiple of block size
  celp filters: Do not read earlier than the start of the 'out' vector.
  motionpixels: Clip YUV values after applying a gradient.
  h263: more strictly forbid frame size changes with frame-mt.
  h264: additional protection against unsupported size/bitdepth changes.

Conflicts:
	Changelog
	RELEASE
	libavcodec/aacsbr.c
	libavcodec/h264_ps.c
	libavcodec/pngdec.c
	libavformat/rtpdec_asf.c

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