Fix harmless warnings about hiding base class virtual in dialogs sample.

GetTitle() added in r71213 resulted in virtual function warnings from g++, fix
them by renaming it to GetBoxTitle().

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71302 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/dialogs/dialogs.h

@@ -208,7 +208,7 @@ public:
     bool Create();
 
 protected:
-    wxString GetTitle() { return m_textTitle->GetValue(); }
+    wxString GetBoxTitle() { return m_textTitle->GetValue(); }
     wxString GetMessage() { return m_textMsg->GetValue(); }
     long GetStyle();