无jira任务 fix：报错

src/widget/downlist/combo.downlist.js

@@ -28,6 +28,7 @@ BI.DownListCombo = BI.inherit(BI.Widget, {
             type: "bi.combo",
             trigger: o.trigger,
             isNeedAdjustWidth: false,
+            isDefaultInit: true,
             container: o.container,
             adjustLength: o.adjustLength,
             direction: o.direction,