OSV-2021-1787 Global-buffer-overflow in stbi__jpeg_decode_block

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=43113 Crash type: Global-buffer-overflow READ 4 Crash state: stbijpegdecodeblock stbidecodejpegimage stbijpegload...