arping: Fix exit code on more replies than sent

Fixes: iputils#538
Reported-by: shuangye
Reviewed-by: Andrea Cervesato <andrea.cervesato@suse.com>
Signed-off-by: Petr Vorel <pvorel@suse.cz>

arping.c

@@ -852,7 +852,7 @@ static int event_loop(struct run_state *ctl)
 	else if (ctl->timeout && !(ctl->count > 0))
 		rc |= !(ctl->received > 0);
 	else
-		rc |= (ctl->sent != ctl->received);
+		rc |= (ctl->sent < ctl->received);
 	return rc;
 }