fix reference to temporary

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@49973 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/colordlg.cpp

@@ -69,7 +69,7 @@ wxColourDialogHookProc(HWND hwnd,
         CHOOSECOLOR *pCC = (CHOOSECOLOR *)lParam;
         wxColourDialog *dialog = (wxColourDialog *)pCC->lCustData;
 
-        const wxString& title = dialog->GetTitle();
+        const wxString title = dialog->GetTitle();
         if ( !title.empty() )
             ::SetWindowText(hwnd, title);