[*] MO : mondial relay - fix for 1.5.2

This fix a bug from the public function changeIdOrderState of OrderHistory class.

Indeed, we this function wait params like this in : 

1.4.11 changeIdOrderState($new_order_state = null, $id_order) so we can give an ID order number
1.5.2 changeIdOrderState($new_order_state, &$id_order, $use_existing_payment = false) we can't give a number for $id_order because he needs an object/array, if we give a number there is a Php Error :