Merge commit '1b891d17'

* commit '1b891d17':
  avconv: fix bitrate report when writing to /dev/null
  avfilter: fix graphparser memleaks on error paths
  rawdec: remove ff_raw_read_header
  pcmdec: remove dependency from rawdec
  g722: refactor out of rawdec.c
  rawvideo: use a specific read_header

Conflicts:
	ffmpeg.c
	libavformat/Makefile
	libavformat/rawdec.c

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