If we pass the active property to the constructor do_clicked seem
to get called. Before chaining up to the Gtk.RadioToolButton
constructor we need to initialize the variable.
This is a followup of 
		
	
					 | 
			||
|---|---|---|
| .. | ||
| __init__.py | ||
| alert.py | ||
| animator.py | ||
| colorbutton.py | ||
| combobox.py | ||
| icon.py | ||
| iconentry.py | ||
| Makefile.am | ||
| menuitem.py | ||
| notebook.py | ||
| objectchooser.py | ||
| palette.py | ||
| palettegroup.py | ||
| palettemenu.py | ||
| palettewindow.py | ||
| panel.py | ||
| radiopalette.py | ||
| radiotoolbutton.py | ||
| style.py | ||
| toggletoolbutton.py | ||
| toolbarbox.py | ||
| toolbox.py | ||
| toolbutton.py | ||
| toolcombobox.py | ||
| tray.py | ||
| window.py | ||
| xocolor.py | ||