libav10 branch: CODEC_ID defines.

svn path=/branches/libavg_libav10/; revision=9673
libav10 branch: Fixed windows build.

svn path=/branches/libavg_libav10/; revision=9674
libav10: Fix Segfault in vdpau when mpeg1video_vdpau isn't available

svn path=/branches/libavg_libav10/; revision=9675