virsh: Interrupt *event --loop on disconnect

The *event --loop commands would keep running even though a connection
to libvirtd is lost. This doesn't make a lot of sense since clearly we
won't get any new events from the closed connection.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

tools/virsh.c

@@ -130,6 +130,7 @@ virshCatchDisconnect(virConnectPtr conn,
             virFreeError(error);
         }
         disconnected++;
+        vshEventDone(ctl);
     }
 }