OSV-2020-555 Heap-use-after-free in WelsDec::CWelsDecoder::SetOption

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=18747 Crash type: Heap-use-after-free WRITE 1 Crash state: WelsDec::CWelsDecoder::SetOption decoderfuzzer.cpp WelsCommon::WelsFree...