__toString() throws a fatal error if it takes arguments in PHP 5.3

Signed-off-by: Michael Tänzer <neo@nhng.de>

manager/application/views/helpers/LeftNav.php

@@ -78,7 +78,7 @@ class Zend_View_Helper_LeftNav extends Zend_View_Helper_Placeholder_Container_St
      * @param  string|null $locale
      * @return string
      */
-    public function __toString($indent = null, $locale = null)
+    public function toString($indent = null, $locale = null)
     {
 		$output = '';
     	$indent = (null !== $indent)

manager/application/views/helpers/TopNav.php

@@ -78,7 +78,7 @@ class Zend_View_Helper_TopNav extends Zend_View_Helper_Placeholder_Container_Sta
      * @param  string|null $locale
      * @return string
      */
-    public function __toString($indent = null, $locale = null)
+    public function toString($indent = null, $locale = null)
     {
 		$output = '';
     	$indent = (null !== $indent)