更新支付

go/gopath/src/fohow.com/apps/controllers/pay_controller/pay_exchange_controller.go

@@ -238,7 +238,7 @@ func (self *PayController) payExchange(oId, payWay, returnUrl, source, remark st
 		userLeftBalanceCount := balance_model.GetUserTotalBalance(wxUId)
 
 		tp += freight
-		total_quan += freight
+		total_quan = total_quan + freight - paiedSilver
 
 		quanLittle := false
 		if useCoupon {