1. Implemented support for different icons for different states (expanded,

selected, combination of them) for the tree control (and doc'd it)
2. removed code which was sending extra event if wxFrame::SetSize() was
   used
3. important changes to wxWizard interface
4. small compilation corrections


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@3756 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/mdi/mdi.cpp

@@ -255,7 +255,7 @@ void MyFrame::OnNewWindow(wxCommandEvent& WXUNUSED(event) )
     subframe->Show(TRUE);
 }
 
-void MyFrame::OnSize(wxSizeEvent& WXUNUSED(event) )
+void MyFrame::OnSize(wxSizeEvent& WXUNUSED(event))
 {
     int w, h;
     GetClientSize(&w, &h);