avcodec/mpeg4videodec: Check sprite delta upshift against overflowing.
Fixes: runtime error: signed integer overflow: -
268386304 * 16 cannot be represented in type 'int'
Fixes: 2204/clusterfuzz-testcase-minimized-
5616756909408256
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit
12245ab1f677074b8ff83e87f76a41aba692ccd6)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>