OSV-2020-405 Stack-buffer-overflow in ZSTD_decodeLiteralsBlock

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=16445 Crash type: Stack-buffer-overflow WRITE Crash state: ZSTDdecodeLiteralsBlock ZSTDdecompressBlock ZSTDdecompressDCtx...