打印失败后，记录失败订单信息到日志

fmTakeaway/Util/wbillcontrol.cpp

@@ -604,7 +604,7 @@ bool WBillControl::sendToPrintServer(QByteArray &JsonPrint)
 
 //外卖单打印
 void WBillControl::printTakeout(const OrderObject *obj,const QString &posOrderId)
-{
+{ 
 #ifdef Q_OS_LINUX
     int fd=-1;
     for(int i=0; i < obj->proList.size(); i++)
@@ -730,7 +730,7 @@ void WBillControl::printTakeout(const OrderObject *obj,const QString &posOrderId
         close_port();
     }
     else{
-        QLOG_ERROR() << "printTakeout failed";
+        QLOG_ERROR() <<"posOrderId:"<<posOrderId<< "printTakeout failed:"<<obj->toString();
     }
 #endif
 }