Change m_selection in wxBookCtrlBase::DoSetSelection() itself instead of requiring all the derived class overriding do it in their overridden UpdateSelectedPage(). No real changes, this is just a small simplification.
Change m_selection in wxBookCtrlBase::DoSetSelection() itself instead of requiring all the derived class overriding do it in their overridden UpdateSelectedPage(). No real changes, this is just a small simplification.