convert 16bit comm stuff to use handles

[Ove Kaaven]

On Sat, 30 Jun 2001, Mike McCormack wrote:

> this is the first step in cleaning up the 16bit comm code.
> This patch is untested, so have a look, and give it a go!

> -  ptr->s_read = SERVICE_AddObject( FILE_DupUnixHandle( ptr->fd,
> -                                     GENERIC_READ | SYNCHRONIZE ),
> +  ptr->s_read = SERVICE_AddObject( ptr->handle,
>                                      comm_notification,
>                                      (ULONG_PTR)ptr );

Not good... you *must* duplicate the handle (probably with
DuplicateHandle) before passing it to SERVICE_AddObject. The
SERVICE_Delete will close the handle passed to AddObject, which is bound
to cause problems if it's not a duplicate.