script: multiap: always get first network id

src/script/multiap

@@ -52,7 +52,7 @@ get_network_id() {
 	local ifname=$1
 
 	[ -n "$ifname" ] || return
-	network_id=$(wpa_cli -i $ifname list_n|tail -n 1 | awk '{print $1}')
+	network_id=$(wpa_cli -i $ifname list_n| sed '1d' | head -n 1 | awk '{print $1}')
 	echo ${network_id}
 }