const hash/crc32.marshaledSize

3 uses

	hash/crc32 (current package)
		crc32.go#L168: 	marshaledSize = len(magic) + 4 + 4
		crc32.go#L179: 	return d.AppendBinary(make([]byte, 0, marshaledSize))
		crc32.go#L187: 	if len(b) != marshaledSize {