Pull request #2318: 无JIRA任务 优化代码

Merge in VISUAL/fineui from ~GUY/fineui:master to master

* commit 'b71cae0184191c676956732f0101767c7649040c':
  优化代码

src/base/single/button/button.node.js

@@ -16,7 +16,9 @@ BI.NodeButton = BI.inherit(BI.BasicButton, {
     },
 
     _initRef: function () {
+        if (this.isOpened()) {
             this.setOpened(this.isOpened());
+        }
         BI.NodeButton.superclass._initRef.apply(this, arguments);
     },