remote: fix incorrect use of strcmp result

When checking if the hostaddresses match up, the result returned from
strcmp was incorrectly evaluated. strcmp returns 0 in case both strings
match.

Signed-off-by: David Bauer <mail@david-bauer.net>

remote.c

@@ -213,7 +213,7 @@ interface_get_host(const char *addr, unsigned long id)
 	avl_insert(&remote_hosts, &host->avl);
 
 out:
-	if (host->addr && strcmp(host->addr, addr) != 0)
+	if (host->addr && !strcmp(host->addr, addr))
 		return host;
 
 	free(host->addr);