[流程表单]修复数字组件设置为显示时计算时没有显示为0的问题

o2web/source/x_component_process_Xform/Number.js

@@ -181,6 +181,9 @@ MWF.xApplication.process.Xform.Number = MWF.APPNumber =  new Class({
             this.validationMode();
         }.bind(this));
     },
+    _computeValue: function(value){
+        return (this.json.defaultValue.code) ? this.form.Macro.exec(this.json.defaultValue.code, this): (value || "0");
+    },
     getValue: function(){
         var value = this._getBusinessData();
         if (!value) value = this._computeValue();