ffmpeg: Index-out-of-bounds in dvbsub_parse_clut_segment

Project: https://git.ffmpeg.org/ffmpeg.git Detailed report: https://oss-fuzz.com/testcase?key=5768907824562176 Project: ffmpeg Fuzzer: libFuzzerffmpegAVCODECIDDVBSUBfuzzer Fuzz target binary: ffmpegAVCODECIDDVBSUBfuzzer Job Type: libfuzzerubsanffmpeg Platform Id: linux Crash Type:...