queriesForRegion does not wrap regions

I created a simple project with an MKMapView, a GeoFire query and an MKMapViewDelegate, which updates GeoFire query region every time UIMapView region changes. But that crash with an unhandled `Not a valid geo location` exception, but only valid regions where used.

The problem is that `queriesForRegion:region` is not wrapping locations when computing locations from regions. As a workaround I have to limit zoom on to MKMapView.