Update h264.c

Added hack from:
http://www.vdr-portal.de/board18-vdr-hardware/board98-arm-co/p1195702-wip-cubieboard-softhddevice-%C3%BCber-vdpau/#post1195702

tested and work's fine with:
576i
720p
and one 1080i juweloHD
TV-Channel's.