require with named callback -- the callback is never called

I like to name my callbacks. The hello method below is never called:

```
function hello() {
  console.log('hi');
}
require(['locale-data/en'], hello); // TODO other languages for extensions
```

It is transformed to:

```
(function() {
function hello() {
  console.log('hi');
}
}());
```

The console.log never happens!
