[lmi] patch to allow building libxml++ without glibmm

[Vadim Zeitlin]

 Hello,

 as discussed previously, I've submitted a patch to libxml++ maintainers.
As expected, it has generated a lovely discussion which can be followed
here http://sourceforge.net/mailarchive/forum.php?forum_id=12784. As you
can see, the maintainer didn't like the first patch so I made the second
one which, AFAICS, is just fine and I submitted it to bugzilla this time:
http://bugzilla.gnome.org/show_bug.cgi?id=320197. I don't think there is
much else I can do but, of course, if any _technical_ (as opposed to "why
should we do this when everyone uses GNOME anyhow" philosophical kind)
issues come up, I'll try to deal with them as well as possible. In any
case, I think the patch above should be used for lmi.

 Regards,
VZ