Fix travis error

htdocs/webservices/server_order.php

@@ -793,6 +793,7 @@ function createOrder($authentication,$order)
  *
  * @param	array		$authentication		Array of authentication information
  * @param	int			$id					Id of order to validate
+ * @param	int			$id_warehouse		Id of warehouse to use for stock decrease
  * @return	array							Array result
  */
 function validOrder($authentication,$id='',$id_warehouse=0)

htdocs/webservices/server_payment.php

@@ -129,12 +129,13 @@ $server->register(
     'WS to create a new payment'
 );
 
+
 /**
  * Create a payment
  *
  * @param      array           $authentication         Array of authentication information
- * @param      Facture         $invoice                        Invoice
- * @return     array                                                   Array result
+ * @param      Object          $payment                Payment
+ * @return     array                                   Array result
  */
 function createPayment($authentication, $payment)
 {