[2.3+] the BUG of TabPanel.render()

[fins]

the defaultValue of TabPanel.activeTab is null ,

but activeTab is Checked with "!== undefined" in render() method :


if(this.activeTab !== undefined){
var item = this.activeTab;
delete this.activeTab;
this.setActiveTab(item);
}

so , this.setActiveTab(null) will be called, then throw Exception.

i think codes below is better:

if(this.activeTab || this.activeTab === 0 ){
var item = this.activeTab;
delete this.activeTab;
this.setActiveTab(item);
}

[tjstuart]

Any status on this? I just grabbed the latest (2.3.0/5511) and bug still there.