OSV-2020-1510 UNKNOWN WRITE in FLAC__bitwriter_write_raw_uint32_nocheck

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=19816 Crash type: UNKNOWN WRITE Crash state: FLACbitwriterwriterawuint32nocheck FLACbitwriterwriterawuint32 FLACframeaddheader...