OSV-2022-1248 Object-size in wabt::BinaryReaderIR::OnCodeMetadataCount

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=54092 Crash type: Object-size Crash state: wabt::BinaryReaderIR::OnCodeMetadataCount wabt::BinaryReader::ReadCodeMetadataSection wabt::BinaryReader::ReadCustomSection...