conf: integrate MR comments

src/knot/conf/logconf.c

@@ -35,7 +35,7 @@ int log_reconfigure(const struct conf_t *conf, void *data)
 	UNUSED(data);
 
 	// Use defaults if no 'log' section is configured.
-	if (list_size(&conf->logs) == 0) {
+	if (EMPTY_LIST(conf->logs)) {
 		log_close();
 		log_init();
 		return KNOT_EOK;

tests/conf.c

@@ -61,7 +61,7 @@ int main(int argc, char *argv[])
 	is_int(0, sockaddr_cmp(&iface->addr, &addr_ref), "interface1 address check");
 
 	// Test 9,10: Check server key
-	if(list_size(&conf->keys) == 0) {
+	if (EMPTY_LIST(conf->keys)) {
 		ok(0, "TSIG key algorithm check - NO KEY FOUND");
 		ok(0, "TSIG key secret check - NO KEY FOUND");
 	} else {