unified wxTaskBarIcon behaviour: wxMSW version is not removed automatically when all frames are closed, it must be destroyed explicitly

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@26318 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/taskbar/tbtest.h

@@ -29,8 +29,6 @@ class MyApp: public wxApp
 {
 public:
     bool OnInit(void);
-protected:
-    MyTaskBarIcon   m_taskBarIcon;
 };
 
 class MyDialog: public wxDialog
@@ -38,12 +36,16 @@ class MyDialog: public wxDialog
 public:
     MyDialog(wxWindow* parent, const wxWindowID id, const wxString& title,
         const wxPoint& pos, const wxSize& size, const long windowStyle = wxDEFAULT_DIALOG_STYLE);
+    ~MyDialog();
 
     void OnOK(wxCommandEvent& event);
     void OnExit(wxCommandEvent& event);
     void OnCloseWindow(wxCloseEvent& event);
     void Init(void);
 
+protected:
+    MyTaskBarIcon   *m_taskBarIcon;
+
 DECLARE_EVENT_TABLE()
 };