Minor tweaks, fix bug

examples/simple_fn.rs

@@ -2,8 +2,6 @@ extern crate rhai;
 use rhai::{Any, Engine, RegisterFn};
 
 fn add(x: i64, y: i64) -> i64 {
-    println!("Adding: {}", x + y);
-
     x + y
 }
 
@@ -11,17 +9,7 @@ fn main() {
     let mut engine = Engine::new();
 
     engine.register_fn("add", add);
-    engine
-        .call_fn_raw(
-            "add".to_owned(),
-            vec![
-                &mut (Box::new(3i64) as Box<Any>),
-                &mut (Box::new(5i64) as Box<Any>),
-            ],
-        )
-        .expect("FAIL");
-
-    //if let Ok(result) = engine.eval::<i64>("add(40, 2)") {
-    //    println!("Answer: {}", result); // prints 42
-    //}
+    if let Ok(result) = engine.eval::<i64>("add(40, 2)") {
+        println!("Answer: {}", result); // prints 42
+    }
 }