const compress/bzip2.invalidNodeValue

4 uses

	compress/bzip2 (current package)
		huffman.go#L32: const invalidNodeValue = 0xffff
		huffman.go#L64: 		if nodeIndex == invalidNodeValue {
		huffman.go#L218: 		node.left = invalidNodeValue
		huffman.go#L230: 		node.right = invalidNodeValue