Added isosurf wxGLCanvas sample, cured OnPaint bug (missing wxPaintDC object)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@553 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

utils/glcanvas/samples/cube/cube.h

@@ -25,14 +25,14 @@ public:
 // Define a new frame type
 class TestGLCanvas;
 class MyFrame: public wxFrame
-{ public:
+{
+public:
     MyFrame(wxFrame *frame, const wxString& title, const wxPoint& pos, const wxSize& size,
         long style = wxDEFAULT_FRAME_STYLE);
 
     void OnExit(wxCommandEvent& event);
-
     bool OnClose(void);
-
+public:
     TestGLCanvas*    m_canvas;
 
 DECLARE_EVENT_TABLE()