Make async_disconnect try harder to shut down target

[Pedro Alves]

On Tuesday 20 September 2011 18:00:25, Joseph S. Myers wrote:
> 2011-09-20  Joseph Myers  <joseph@codesourcery.com>
> 
>         * event-top.c (async_disconnect): If an exception is thrown from
>         quit_cover, call pop_all_targets.  Use TRY_CATCH instead of
>         catch_errors.
>         * top.c (quit_cover): Return void and take no arguments.
>         * top.h (quit_cover): Update prototype.

Okay.

-- 
Pedro Alves