Fix type error

www/common/common-interface.js

@@ -198,7 +198,7 @@ define([
         frame.closeModal = function (cb) {
             $frame.fadeOut(150, function () {
                 $frame.detach();
-                cb();
+                if (typeof(cb) === "function") { cb(); }
             });
         };
         return $frame.click(function (e) {

www/kanban/inner.js

@@ -381,7 +381,7 @@ define([
             } else {
                 dataObject = kanban.getItemJSON(id);
             }
-            // Check if our itme has been deleted
+            // Check if our item has been deleted
             if (!dataObject) {
                 var $frame = $(modal).parents('.alertify').first();
                 if ($frame[0] && $frame[0].closeModal) {