network: Add more debugging output when running exclude

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

src/database.c

@@ -1370,7 +1370,7 @@ static int __loc_database_enumerator_next_network_flattened(
 	struct loc_network_list* excluded = loc_network_exclude_list(*network, enumerator->subnets);
 	if (!excluded) {
 		loc_network_list_clear(enumerator->subnets);
-		return -1;
+		return 1;
 	}
 
 	// Merge subnets onto the stack

src/network.c

@@ -406,6 +406,9 @@ ERROR:
 	if (subnet2)
 		loc_network_unref(subnet2);
 
+	if (r)
+		DEBUG(network->ctx, "%s has failed with %d\n", __FUNCTION__, r);
+
 	return r;
 }