Fixed potential crash in mapViews*s animationDidStop:finished:context:
Merge branch 'master' of https://github.com/applidium/ADClusterMapView
Merge branch 'master' of https://github.com/applidium/ADClusterMapView
Merge pull request #21 from PocketScientists/master

Fixed potential crash in mapView's animationDidStop:finished:context: