修改任务台BC变更结果查询

Myshipping.Application/Service/BookingSlot/BookingSlotService.cs

@@ -1168,8 +1168,13 @@ namespace Myshipping.Application
                 throw Oops.Oh($"获取舱位变更比对结果错误，比对内容不存在");
             }
 
+            if(!string.IsNullOrWhiteSpace(compareInfo.COMPARE_RLT))
+            {
                 return JSON.Deserialize<List<CompareResultDetailInfo>>(compareInfo.COMPARE_RLT);
             }
+
+            return new List<CompareResultDetailInfo>();
+        }
         #endregion
 
         #region 导入舱位