Fix constant during 4.1 upgrade

CRM/Upgrade/Incremental/php/FourOne.php

@@ -33,6 +33,9 @@
  *
  */
 class CRM_Upgrade_Incremental_php_FourOne {
+  // This was changed in 4.3 so we define it locally for compatability with older dbs
+  const NAVIGATION_NAME = "Navigation Menu";
+
   function verifyPreDBstate(&$errors) {
     $config = CRM_Core_Config::singleton();
     if (in_array('CiviCase', $config->enableComponents)) {
@@ -123,7 +126,7 @@ class CRM_Upgrade_Incremental_php_FourOne {
 
 
     $userColumnNames = array(
-      CRM_Core_BAO_Setting::NAVIGATION_NAME => array(
+      self::NAVIGATION_NAME => array(
         'navigation',
       ),
     );