Simplified compilation of function calls

tests/programs/function-pointer-field.q

@@ -0,0 +1,11 @@
+import core
+
+struct Struct {
+	func *any
+}
+
+main() {
+	s := new(Struct)
+	s.func = core.exit
+	s.func()
+}

tests/programs/loop-in-loop.q

@@ -0,0 +1,21 @@
+import sys
+
+main() {
+	x := 0
+
+	loop {
+		for 0..10 {
+			x += 1
+		}
+
+		assert x == 10
+
+		loop {
+			x -= 1
+
+			if x == 0 {
+				sys.exit(0)
+			}
+		}
+	}
+}