wxAUI: Do not leak a wxFrame if transparency is not supported

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@40235 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/aui/framemanager.cpp

@@ -526,6 +526,7 @@ void wxFrameManager::SetManagedWindow(wxWindow* frame)
     if (m_hint_wnd && !m_hint_wnd->CanSetTransparent())
     {
         m_hint_wnd->Close();
+        m_hint_wnd->Destroy();
         m_hint_wnd = NULL;
     }    
 }