Ticket #13215: 13215.check.for.deleted.menu.1.patch

wp-admin/js/nav-menu.dev.js

@@ -409 +409 @@
                         
                         $.fn.extend({
                                 makeTabVisible : function() {
-                                        var t = this.eq(0),
-                                                left = t.offset().left,
-                                                right = left + t.outerWidth();
+                                        var t = this.eq(0), left, right;
+                                        if( ! t.length ) return;
+                                        left = t.offset().left;
+                                        right = left + t.outerWidth();
                                         if( right > fixedRight )
                                                 fluid.animate({ 'margin-left' :  "+=" + (fixedRight - right) + 'px', }, 'fast');
                                         else if ( left < fixedLeft )