Hello,

I have uploaded brltty/6.5-7 to unstable, to make it hopefully included
in bookworm.

[ Reason ]
It was reported on
http://brltty.app/pipermail/brltty/2023-March/019836.html
that cursor routing is not working at all any more in X, because of a
crash in the routing process that 6.5-7 fixes.

[ Impact ]
Cursor routing is the way for blind users to be very efficient. Just
like we can click with the mouse wherever we want in some text to bring
the cursor there, when a blind user is reading some text they can press
a little button above the letter to bring the cursor there. Currently
the cursor doesn't move at all, and thus blind users have lost their way
to be very efficient at editing text.

The problem only affects X, not the Linux console, but more and more
blind users have to migrate to X environments since java-script-enabled
websites can nowaday only be browsed with e.g. firefox.

[ Tests ]
This was tested manually.

[ Risks ]
The code is very trivial: just check for the pointer before freeing the
underlying resource.

[ Checklist ]
  [X] all changes are documented in the d/changelog
  [X] I reviewed all changes and I approve them
  [X] attach debdiff against the package in testing

[ Other info ]
I also included a small pending d-i translation.

unblock brltty/6.5-7

Unblocked.