Enable larger screen scales
Enable larger screen scales

Fix for screen scales larger than 2x. Current code will render the 1x
callout arrow at a 3x scale on the iPhone 6 Plus.

dmiedema/calloutview,Suninus/calloutview,Petvetbook/calloutview,nfarina/calloutview,XBeg9/calloutview,mapbox/SMCalloutView,dmiedema/calloutview,XBeg9/calloutview,mapbox/SMCalloutView,Petvetbook/calloutview,Aiwis/calloutview,nfarina/calloutview,Aiwis/calloutview,Suninus/calloutview