don't use wxStrings in a statically initialized array of structs, VC6 doesn't like it (re-closes #9492)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@55547 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/dialogs/dialogs.h

@@ -195,10 +195,10 @@ private:
     struct BtnInfo
     {
         int flag;
-        wxString name;
+        const char *name;
     };
 
-    static BtnInfo ms_btnInfo[Btn_Max];
+    static const BtnInfo ms_btnInfo[Btn_Max];
 
     wxTextCtrl *m_textMsg,
                *m_textExtMsg;