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

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Sun Mar 17 14:30:26 2013 +0100| [975fbd43addbf70c047167b761ddcf06e8083c14] | committer: Michael Niedermayer

Merge remote-tracking branch 'cigaes/master'

* cigaes/master:
  lavfi/buffersink: fix header.
  lavfi/buffersrc: disable deprecated warnings.
  lavfi/buffersrc: check channel count changes.
  lavfi/buffersrc: set channel layout if it is known.

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=975fbd43addbf70c047167b761ddcf06e8083c14
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