Michael Niedermayer 10add8bb66 avcodec/cdgraphics: avoid signed overflow in alpha ...

Fixes: left shift of 255 by 24 places cannot be represented in type 'int'
Fixes: 42766/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_CDGRAPHICS_fuzzer-5142826105569280

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

2021-12-25 11:59:47 +01:00

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