增加接口输入限制

WarehouseMgr/Tnb.WarehouseMgr/WmsSignForDeliveryService.cs

@@ -121,6 +121,7 @@ namespace Tnb.WarehouseMgr
         [HttpPost]
         public async Task MESCarrySign(MESCarrySignInput input) 
         {
+            if (input.IsNull()) throw new ArgumentNullException("input");
             var signInput = input.Adapt<SignForDeliveryInput>();
             await SignForDelivery(signInput);
         }