libvips:pngsave_buffer_fuzzer: Crash in lzw__write_pixels

Project: https://github.com/libvips/libvips.git Detailed Report: https://oss-fuzz.com/testcase?key=6250664033386496 Project: libvips Fuzzing Engine: libFuzzer Fuzz Target: pngsavebufferfuzzer Job Type: libfuzzerubsanlibvips Platform Id: linux Crash Type: UNKNOWN READ Crash Address: 0x0000040d5912...