sm-notify command: fix a use-after-free bug

The recv_reply() function was referencing host->ai in a freeaddrinfo(3)
call after it had freed @host.

This is not likely to be harmful in a single-threaded user context,
but it's still bad form, and it will get called out if testing
sm-notify with poisoned free memory.  The less noise, the better we
are able to see real problems.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>