From cf627cdf1e8e72c4aa0d853264e38ac9be91bfa8 Mon Sep 17 00:00:00 2001
From: Alex Kovalevych <alexkovalevych@gmail.com>
Date: Sun, 13 May 2012 15:26:27 +0300
Subject: [PATCH] fixed theme preview for the wp version 3.3.2

---
 inc/cleanup.php | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/inc/cleanup.php b/inc/cleanup.php
index 15a0518..bc91682 100644
--- a/inc/cleanup.php
+++ b/inc/cleanup.php
@@ -465,9 +465,10 @@ class Roots_Navbar_Nav_Walker extends Walker_Nav_Menu {
 
     $classes = array_filter($classes, array(&$this, 'check_current'));
 
-    $custom_classes = get_post_meta($item->ID, '_menu_item_classes', true);
-    foreach ($custom_classes as $custom_class) {
-      $classes[] = $custom_class;
+    if ($custom_classes = get_post_meta($item->ID, '_menu_item_classes', true)) {
+        foreach ($custom_classes as $custom_class) {
+          $classes[] = $custom_class;
+        }
     }
 
     $class_names = join(' ', apply_filters('nav_menu_css_class', array_filter($classes), $item, $args));