NPE check was added in method  onShow( final TabPanel.ShowEvent e )

It was detected that in some use cases (for example when a new TabPanel was added to the original TabPanel) the method onShow( final TabPanel.ShowEvent e ) throws an NPE.
The fix basically adds the same tra/catch that already existed for the fist handler.



Walter can you describe when the issue happens? And whats the issue? Which object is null?