fixed php errors on install/update

cfoe

2012-08-21 41eaa8742ea0004c49d5407b9caa3cf01e836fe3

 interface/web/login/logout.php

@@ -76,5 +76,8 @@
      echo('URL_REDIRECT:index.php');
   }
}
exit;
?>
// Destroy the session completely now
$_SESSION = array();
session_destroy();
session_write_close();
?>