If the gconf var window_height or window_width are changed,
        this method will be called and will call the resize function
        in guake.

def size_changed(self, settings, key, user_data):
        """If the gconf var window_height or window_width are changed,
        this method will be called and will call the resize function
        in guake.
        """
        RectCalculator.set_final_window_rect(self.settings, self.guake.window)