sae session challenge, to get former order in thankyou

copy_this/modules/d3/d3dev/modules/controllers/d3_dev_thankyou.php

@@ -21,8 +21,12 @@ class d3_dev_thankyou extends d3_dev_thankyou_parent
 {
     public function init()
     {
+        $sSessChallenge = oxRegistry::getSession()->getVariable('sess_challenge');
+
         parent::init();
 
+        oxRegistry::getSession()->setVariable('sess_challenge', $sSessChallenge);
+
         if (oxRegistry::getConfig()->getRequestParameter('d3dev')
             && false == (bool) oxRegistry::getConfig()->getActiveShop()->oxshops__oxproductive->value
             && oxRegistry::getConfig()->getConfigParam('blD3DevShowThankyou')