Paul B Mahol c22488f718 avcodec/smcenc: make sure ny/nx are >= 0 ...

(cherry picked from commit 5ad38785e7ad4067a288e9d5e8ce2c4ed2bf584a)

Fixes: out of array read
Fixes: 68939/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SMC_fuzzer-587804104884224

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

2024-06-26 20:49:35 +02:00

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