firebase/angularFire — pull request #234 by rabhw (2014-01-25 02:31:17+00:00)
Title: Add missing call to .ref() before calling .update()

Without this adjustment, angularFire will throw the following error when updating the limit of a Query.
```Object # has no method 'update'```

I'm assuming that's because .update() isn't available on the Query reference, only on the base reference.