Removed PHP "warning"

git-svn-id: http://svn.code.sf.net/p/itop/code/trunk@969 a333f486-631f-4898-b8df-5754b55c2be0

application/portalwebpage.class.inc.php

@@ -164,6 +164,7 @@ EOF
 	
 	public function output()
 	{
+		$sMenu = '';
 		$this->AddMenuButton('logoff', 'Portal:Disconnect', '../pages/logoff.php?portal=1'); // This menu is always present and is the last one
 		foreach($this->m_aMenuButtons as $aMenuItem)
 		{
@@ -173,4 +174,4 @@ EOF
 		parent::output();
 	}
 }
-?>
+?>