核价后台：1、修复床垫列表页显示报价清单报错问题

JLHHJSvr/Excutor/GetComputeMattressByIdExcutor.cs

@@ -45,7 +45,7 @@ namespace JLHHJSvr.Excutor
                 var mxList = mattressHelper.GetMattressMxMtrl(request.mattressid.Value);
 
                 
-                if (mattress.dannum_type.Value == 0)
+                if (mattress.dannum_type == null || mattress.dannum_type.Value == 0)
                 {
                     mattress.dannum_type = 2; // 默认标准
                 }