Index: branches/5.1.x/core/kernel/session/session.php
===================================================================
diff -u -N -r13581 -r13782
--- branches/5.1.x/core/kernel/session/session.php	(.../session.php)	(revision 13581)
+++ branches/5.1.x/core/kernel/session/session.php	(.../session.php)	(revision 13782)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: session.php 13581 2010-05-19 07:33:23Z alex $
+* @version	$Id: session.php 13782 2010-06-15 20:41:16Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -371,13 +371,14 @@
 	 * @param Session $session
 	 * @param string $var_name
 	 * @param mixed $var_value
+	 * @param bool $optional
 	 */
-	function StorePersistentVar(&$session, $var_name, $var_value)
+	function StorePersistentVar(&$session, $var_name, $var_value, $optional = false)
 	{
 		$user_id = $session->RecallVar('user_id');
 		if ($user_id == USER_GUEST || $user_id === false) {
 			// -2 (when not logged in), false (when after u:OnLogout event)
-			$session->StoreVar($var_name, $var_value);
+			$session->StoreVar($var_name, $var_value, $optional);
 			return ;
 		}
 
@@ -1297,9 +1298,9 @@
 		}
 	}
 
-	function StorePersistentVar($name, $value)
+	function StorePersistentVar($name, $value, $optional = false)
 	{
-		$this->Storage->StorePersistentVar($this, $name, $value);
+		$this->Storage->StorePersistentVar($this, $name, $value, $optional);
 	}
 
 	function LoadPersistentVars()