static int compare_sender(gconstpointer a, gconstpointer b)
{
	const struct discovery_client *client = a;
	const char *sender = b;

	return g_strcmp0(client->owner, sender);
}
static int compare_sender(gconstpointer a, gconstpointer b)
{
	const struct discovery_client *client = a;
	const char *sender = b;

	return g_strcmp0(client->owner, sender);
}