[BRLTTY] BRLTTY 4.4 segfault with backtrace

[Jason White]

Samuel Thibault <samuel.thibault at ens-lyon.org> wrote:
 
> I can indeed reproduce it with the XWindow driver. Could you try the
> attached patch?
> 
> The fix is making api_unlink restore the brlapi server state to what it
> is on first entering api_link: while the api is unlinked, the driver
> should be not constructed from the point of view of brlapi, so that
> brlapi does not try to use it.

Patch applied and all is working in initial tests.