Log Message:
Changes 2.4.3:
* avcodec/h264_slice: Clear table pointers to avoid stale pointers
* avcodec/h264_parser: rewrite the parse_nal_units() loop logic based on h264.c
* avcodec/h264: simplify find_start_code()
* Move get_avc_nalsize() and find_start_code() to h264.h
* mpeg4vdpau: Fix priv data size.
* avformat/matroskadec: do not trust the default duration to be the real \ 
1/timebase if its less than 5fps
* avformat/options_table: add FF_COMPLIANCE_UNOFFICIAL
* Stop demuxing wtv on eof.