documentcloud/backbone — pull request #747 by joefiorini (2011-11-13 03:16:17+00:00)
Title: return false if this.el is not in DOM 

Given I create a view like the following:

```javascript
new MyView({ el: $("#my-element") });
```

When I render that view and no element with ID my-element exists on the page
Then _ensureElement should create the element for me

Instead _ensureElement doesn't create anything because !this.el still returns true.