Fix some tests and do some cleanup.

test/wrong_multiply.inx

@@ -0,0 +1,6 @@
+vertex main :: (pos : float4 @position) -> float4 @position {
+	res : float2 = float2(2.0, 2.0);
+	foo : float = 1.0;
+	result : float4 = float4(1.0, foo * res, 0.0, 1.0);
+	return result;
+}