修复市配预约配送报错问题

src/views/distribution/turndelivery/deliveryMarket.vue

@@ -1553,7 +1553,7 @@ export default {
             a.push(item);
             // 主司机赋值
             if (i === 0) this.driverForm.masterDriverName = item.name;
-            if (!this.driverForm.masterVehicleNub)
+            if (!this.driverForm.masterVehicleNub && item.vehicleVOList)
               this.driverForm.masterVehicleNub = item.vehicleVOList[0].vehicleNub;
 
             // 车辆赋值, 当司机数大于车辆数时, 取最后一位司机的车辆