afterUpdate call: fixed undefined opt

Author: nlemoine

js/jquery.mapael.js

@@ -172,7 +172,8 @@
 					$.fn.mapael.updateElem(elemOptions, plots[id], $tooltip, animDuration);
 				}
 
-				opt.afterUpdate && opt.afterUpdate($self, paper, areas, plots, options);
+				if( typeof opt != 'undefined' )
+					opt.afterUpdate && opt.afterUpdate($self, paper, areas, plots, options);
 			});
 
 			// Handle resizing of the map
@@ -863,4 +864,4 @@
 		, areas : {}
 		, plots : {}
 	};
-})(jQuery);
+})(jQuery);