[FFmpeg-cvslog] Merge remote-tracking branch 'qatar/master'

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Fri Mar 23 21:20:06 2012 +0100| [e2d110d8d21469987b6e5866398ef01654560c3b] | committer: Michael Niedermayer

Merge remote-tracking branch 'qatar/master'

* qatar/master:
  rv34: Handle only complete frames in frame-mt.
  MPV: set reference frame pointers to NULL when allocation of dummy pictures fails
  configure: die if x11grab dependencies are unavailable
  zerocodec: factorize loop
  avconv: fix the resampling safety factors for output audio buffer allocation
  avconv: move audio output buffer allocation to a separate function
  avconv: make the async buffer global and free it in exit_program()

Conflicts:
	ffmpeg.c
	libavcodec/mpegvideo.c
	libavcodec/rv34.c
	libavcodec/zerocodec.c

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e2d110d8d21469987b6e5866398ef01654560c3b
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