Fixed a notice with "session validator data" in onepage checkout (#2318)

Author: azambon

app/code/core/Mage/Checkout/Model/Type/Onepage.php

@@ -730,7 +730,7 @@ protected function _prepareNewCustomerQuote()
 
         Mage::helper('core')->copyFieldset('checkout_onepage_quote', 'to_customer', $quote, $customer);
         $customer->setPassword($customer->decryptPassword($quote->getPasswordHash()));
-        $passwordCreatedTime = $this->_checkoutSession->getData('_session_validator_data')['session_expire_timestamp']
+        $passwordCreatedTime = $this->_checkoutSession->getSessionValidatorData()['session_expire_timestamp']
             - Mage::getSingleton('core/cookie')->getLifetime();
         $customer->setPasswordCreatedAt($passwordCreatedTime);
         $quote->setCustomer($customer)

app/code/core/Mage/Core/Model/Session/Abstract/Varien.php

@@ -570,6 +570,14 @@ public function getValidatorData()
 
         return $parts;
     }
+    
+    /**
+     * @return array
+     */
+    public function getSessionValidatorData()
+    {
+        return $_SESSION[self::VALIDATOR_KEY];
+    }
 
     /**
      * Regenerate session Id