修复堆垛机相关报错

Projects/永冠OPP/WCS.Service/Works/SRM/SRMWork.cs

@@ -342,6 +342,7 @@ namespace WCS.Service.Works.SRM
                                                    .ThenBy(v => v.CREATETIME)
                                                    .GroupBy(v => v.ADDRTO)
                                                    .FirstOrDefault(v => !priorityADDRTO.Contains(v.Key))!
+                                                   .Where(v => v != null)
                                                    .Select(v => v).ToList();
 
                         //获取两个个可执行任务，此时这两个任务的目标地址是一致的