const compress/flate.numCodes

4 uses

	compress/flate (current package)
		inflate.go#L25: 	numCodes   = 19 // number of codes in Huffman meta-code
		inflate.go#L281: 	codebits *[numCodes]int
		inflate.go#L802: 	f.codebits = new([numCodes]int)
		inflate.go#L821: 	f.codebits = new([numCodes]int)