Added checks that the callbacks actually are defined before calling them

Author: robinwassen

js/src/ng-annotate.coffee

@@ -260,7 +260,9 @@ ngAnnotate.directive "ngAnnotate", ($rootScope, $compile, $http, $q, NGAnnotatio
 						$scope.$apply()
 						$span = element.find ".ng-annotation-" + annotation.id
 					catch ex
-						$scope.onAnnotateError ex
+						if $scope.onAnnotateError?
+							$scope.onAnnotateError ex
+							
 						return
 
 					clearPopups()
@@ -273,12 +275,17 @@ ngAnnotate.directive "ngAnnotate", ($rootScope, $compile, $http, $q, NGAnnotatio
 
 					popup.scope.$reject = ->
 						removeAnnotation annotation.id, $scope.annotations
-						$scope.onAnnotateDelete annotation
+						
+						if $scope.onAnnotateDelete?
+							$scope.onAnnotateDelete annotation
+
 						clearPopups()
 						popup.destroy()
 
 					popup.scope.$close = ->
-						$scope.onAnnotate popup.scope.$annotation
+						if $scope.onAnnotate?
+							$scope.onAnnotate popup.scope.$annotation
+
 						clearPopups()
 						popup.destroy()