ugly 'fix' for wxHtmlHelpFrame's misbehviour under wxGTK

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@17893 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/html/helpfrm.cpp

@@ -1125,8 +1125,12 @@ void wxHtmlHelpFrame::OnActivate(wxActivateEvent& event)
 {
     // This saves one mouse click when using the
     // wxHTML for context sensitive help systems
+#ifndef __WXGTK__
+    // NB: wxActivateEvent is a bit broken in wxGTK
+    //     and is sometimes sent when it should not be
     if (event.GetActive() && m_HtmlWin)
         m_HtmlWin->SetFocus();
+#endif
 
     event.Skip();
 }