State.apply() generates empty view object

`State.apply()` adds an empty view attribute to the generated state object, when the view was not explicitly specified in `State.apply()`. E.g.

``` scala
$stateProvider.state("foo", State(url="foo", template="<p>bar!</p>"))
```

results in

``` javascript
$stateProvider.state('foo', { url: 'foo', template: '<p>bar!</p>', view: {} });
```
