OSV-2023-936 Heap-buffer-overflow in Gfx::decode_bmp_pixel_data

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=62782 Crash type: Heap-buffer-overflow READ 1 Crash state: Gfx::decodebmppixeldata Gfx::BMPImageDecoderPlugin::frame Gfx::ICOImageDecoderPlugin::loadicobitmap...