processor_id array key fix (4.7)

CRM/Core/Payment/Stripe.php

@@ -634,7 +634,7 @@ class CRM_Core_Payment_Stripe extends CRM_Core_Payment {
     $query_params = array(
       1 => array($stripe_customer->id, 'String'),
       2 => array($invoice_id, 'String'),
-      2 => array($this->_paymentProcessor['id'], 'Integer'),
+      3 => array($this->_paymentProcessor['id'], 'Integer'),
     );
 
     // Insert the new Stripe Subscription info.