Making sm_classTable private

[Mattia Barbon]

  Hello,
while working with XTI I noticed a FIXME comment about
making wxClassInfo::sm_classTable private.  Adding a
const iterator interface to wxClassInfo, is straightforward:

  for( wxClassInfo::const_iterator node = wxClassInfo::begin_classinfo(),
                                    end = wxClassInfo::end_classinfo();
       node != end; ++node )
  {
     const wxClassInfo *info = *node;
     // stuff...
  }

should I go ahead and make the change or is there a better interface?

  While I am at it, making private the other public wxClassInfo members
should be easy.

Regards
Mattia