OSV-2020-1840 Heap-use-after-free in avifFileTypeIsCompatible

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=25910 Crash type: Heap-use-after-free READ 4 Crash state: avifFileTypeIsCompatible avifDecoderParse avifdecodefuzzer.cc...