avcodec/jpeglsdec: Check Jpeg-LS LSE
Fixes: signed integer overflow: 2147478526 + 33924 cannot be represented in type 'int' Fixes: shift exponent 32 is too large for 32-bit type 'unsigned int' Fixes: 64243/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEGLS_fuzzer-5195717848989696 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpegSigned-off-by:Michael Niedermayer <michael@niedermayer.cc>
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