Handle break and return better.

tests/looping.rs

@@ -1,27 +1,29 @@
-use rhai::{Engine, EvalAltResult};
+use rhai::{Engine, EvalAltResult, INT};
 
 #[test]
 fn test_loop() -> Result<(), EvalAltResult> {
     let mut engine = Engine::new();
 
-    assert!(engine.eval::<bool>(
-        r"
-			let x = 0;
-			let i = 0;
+    assert_eq!(
+        engine.eval::<INT>(
+            r"
+				let x = 0;
+				let i = 0;
 
-			loop {
-				if i < 10 {
-					x = x + i;
-					i = i + 1;
+				loop {
+					if i < 10 {
+						x = x + i;
+						i = i + 1;
+					} else {
+						break;
+					}
 				}
-				else {
-					break;
-				}
-			}
 
-			x == 45
+				return x;
 		"
-    )?);
+        )?,
+        45
+    );
 
     Ok(())
 }