OSV-2020-1155 Heap-buffer-overflow in FLAC__bitreader_read_rice_signed_block

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=17069 Crash type: Heap-buffer-overflow READ 4 Crash state: FLACbitreaderreadricesignedblock readresidualpartitionedrice readsubframelpc...