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

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Thu Mar  6 02:04:15 2014 +0100| [c832bf0c38a36698684971eca5f779d115b01976] | committer: Michael Niedermayer

Merge remote-tracking branch 'lukaszmluki/master'

* lukaszmluki/master:
  lavd/avdevice: always free detected devices on error
  lavf/http: return error from seek on invalid whence
  lavf/http: return error on seeking to negative postion
  lavf/avio: fix ffurl_alloc error checks

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=c832bf0c38a36698684971eca5f779d115b01976
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