Added check to only add items that have not been cancelled.

Author: roboncode

src/sortable.js

@@ -59,8 +59,11 @@ angular.module('ui.sortable', [])
 
               callbacks.receive = function(e, ui) {
                 ui.item.sortable.relocate = true;
-                // added item to array into correct position and set up flag
-                ngModel.$modelValue.splice(ui.item.index(), 0, ui.item.sortable.moved);
+                  // if the item still exists (it has not been cancelled)
+                  if(ui.item.sortable.moved) {
+                      // added item to array into correct position and set up flag
+                      ngModel.$modelValue.splice(ui.item.index(), 0, ui.item.sortable.moved);
+                  }
               };
 
               callbacks.remove = function(e, ui) {