avcodec/exr: x/ymax cannot be INT_MAX
The code uses x/ymax + 1 so the maximum is INT_MAX-1
Fixes: signed integer overflow:
2147483647 + 1 cannot be represented in type 'int'
Fixes: 33158/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_EXR_fuzzer-
5545462457303040
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
48342aa0750f83006582d1598b5f22297f6dbf83)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>