OSV-2024-404 Use-of-uninitialized-value in avifSequenceHeaderParse

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=68568 Crash type: Use-of-uninitialized-value Crash state: avifSequenceHeaderParse avifDecoderReset avifDecoderParse...