ffmpeg/ffmpeg_AV_CODEC_ID_DXV_fuzzer: Crash in dxt1_block_internal

Project: https://git.ffmpeg.org/ffmpeg.git Detailed report: https://oss-fuzz.com/testcase?key=5071018000908288 Project: ffmpeg Fuzzer: libFuzzerffmpegAVCODECIDDXVfuzzer Fuzz target binary: ffmpegAVCODECIDDXVfuzzer Job Type: libfuzzerubsanffmpeg Platform Id: linux Crash Type: UNKNOWN WRITE Crash...