OSV-2023-800 Heap-buffer-overflow in XCFImageFormat::loadTileRLE

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=62098 Crash type: Heap-buffer-overflow WRITE 1 Crash state: XCFImageFormat::loadTileRLE XCFImageFormat::loadLevel XCFImageFormat::loadHierarchy...