Function normalize2

NULLC/includes/math.cpp:148–154

		return sqrt(v->x * v->x + v->y * v->y);
	}
	float normalize2(float4* v)
	{
		float len = length2(v), invLen = 1.0f / len;
		v->x *= invLen;
		v->y *= invLen;
		return len;
	}

	float length3(float4* v)
	{