applidium/ADClusterMapView — pull request #30 by alloy (2013-09-17 09:57:24+00:00)
Title: Do not crash when no cluster title is provided.

This happens when an annotation was selected (the callout is shown) and the view deallocates. It seems the private `MKMapAnnotationManager` class still ends up calling this `title` method, which in my case has no custom title, leading to an exception in `+[NSString stringWithFormat]`.

/cc @jeffkreeftmeijer