hostapd: fix undeclared variable iface_name

Signed-off-by: Nazar Mokrynskyi <[email protected]>

package/network/services/hostapd/files/hostapd.uc

@@ -278,12 +278,12 @@ function iface_reload_config(phydev, config, old_config)
 		return false;
 
 	let iface = hostapd.interfaces[phy];
+	let iface_name = old_config.bss[0].ifname;
 	if (!iface) {
 		hostapd.printf(`Could not find previous interface ${iface_name}`);
 		return false;
 	}
 
-	let iface_name = old_config.bss[0].ifname;
 	let first_bss = hostapd.bss[iface_name];
 	if (!first_bss) {
 		hostapd.printf(`Could not find bss of previous interface ${iface_name}`);