refactor: refs #6499 Minor change

db/routines/vn/procedures/pay.sql

@@ -24,6 +24,7 @@ BEGIN
  * @param vExpenseFk Id de gasto
  * @param vConcept Concepto del pago
  * @param vCompanyFk Id de la empresa
+ * @return paymentFk Id de pago insertado
  */
 	INSERT INTO till(
 			concept,
@@ -77,6 +78,6 @@ BEGIN
 			vCompanyFk
 		);
 			
-	SELECT LAST_INSERT_ID() pago_id;
+	SELECT LAST_INSERT_ID() paymentFk;
 END$$
 DELIMITER ;