MurMurHash finalizers as 32-bit integer/pointer hashers

murmur.h

uint32_t murmur2(uint32_t h)
{
	h ^= h >> 13;
	h *= 0x5bd1e995;
	h ^= h >> 15;

	return h;
}

uint32_t murmur3(uint32_t h)
{
	h ^= h >> 16;
	h *= 0x85ebca6bu;
	h ^= h >> 13;
	h *= 0xc2b2ae35u;
	h ^= h >> 16;

	return h;
}