wifi-scripts: ucode: fix invalid generated MAC address

macaddr_base can be NULL, in which case it needs to be passed as an empty string

Signed-off-by: Felix Fietkau <nbd@nbd.name>

Author: nbd168

package/network/config/wifi-scripts/files-ucode/usr/share/ucode/wifi/iface.uc

@@ -231,7 +231,7 @@ function macaddr_random() {
 let mac_idx = 0;
 export function prepare(data, phy, num_global_macaddr, macaddr_base) {
 	if (!data.macaddr) {
-		let pipe = fs.popen(`ucode /usr/share/hostap/wdev.uc ${phy} get_macaddr id=${mac_idx} num_global=${num_global_macaddr} mbssid=${data.mbssid ?? 0} macaddr_base=${macaddr_base}`);
+		let pipe = fs.popen(`ucode /usr/share/hostap/wdev.uc ${phy} get_macaddr id=${mac_idx} num_global=${num_global_macaddr} mbssid=${data.mbssid ?? 0} macaddr_base=${macaddr_base ?? ""}`);
 
 		data.macaddr = trim(pipe.read("all"), '\n');
 		pipe.close();