several notebook bugs fixed:

1. deleting the last page sets selection to -1
2. deleting the selected page unselects it first
3. adding page calls Layout() on it


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2888 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/notebook/test.h

@@ -52,7 +52,10 @@ public:
     void OnAddPage(wxCommandEvent& event);
     void OnDeletePage(wxCommandEvent& event);
     void OnSize(wxSizeEvent& event);
-    void Init(void);
+    void OnIdle(wxIdleEvent& event);
+
+    void Init();
+
 protected:
     wxNotebook*     m_notebook;
     wxPanel*        m_panel; // Panel containing notebook and OK/Cancel/Help