Check for the unl_sso cookie to be set before doing a gateway CAS auth.

library/App/Controller/Action.php

@@ -20,6 +20,10 @@ class App_Controller_Action extends Unl_Controller_Action
     {
         $session = new Zend_Session_Namespace(__CLASS__);
         
+        if (!array_key_exists('unl_sso', $_COOKIE)) {
+        	return;
+        }
+        
     	// The auth module is doing its thing (probably an active login or logout). Let it be.
     	if (get_class($this) == 'Auth_IndexController') {
     		return;