Added int to float coercions to function args and returns, when specified

scripts/shadow.toy

@@ -0,0 +1,8 @@
+//something was odd, so I broke this down for testing
+import math;
+
+fn shadowCastPoint(x: float, y: float, depth: int) {
+	return sin(tan(x/y)) * depth;
+}
+
+print shadowCastPoint(1, 1, 10);