OSV-2022-1145 Heap-buffer-overflow in gbNUMBER_mbc_enc_len

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=53046 Crash type: Heap-buffer-overflow READ 1 Crash state: gbNUMBERmbcenclen onigencmbnmbctocode gbNUMBERmbctocode...