OSV-2021-362 Heap-use-after-free in DestroyPicBuff

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=30770 Crash type: Heap-use-after-free WRITE 4 Crash state: DestroyPicBuff WelsRequestMem SyncPictureResolutionExt...