OSV-2023-500 Heap-buffer-overflow in stbiw__encode_png_line

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=42525448 Crash type: Heap-buffer-overflow READ 1 Crash state: stbiwencodepngline stbiwritepngtomem Ogre::STBIImageCodec::encode...