Michael Niedermayer 2f588ccfb7 avcodec/vc1_block: Fix invalid left shift in vc1_decode_p_mb() ...

Fixes: left shift of negative value -6
Fixes: 17810/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VC1_fuzzer-5638541240958976

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

2019-10-03 19:37:28 +02:00

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