Fix array usage

sbin/netcardconfig

@@ -499,11 +499,11 @@ if [ -z "$WLAN" ] ; then
   WLAN_OLD=$(tail -n +3 /proc/net/wireless 2>/dev/null|awk -F: '{print $1}')
   # /proc/net/wireless does not work e.g. with iwl3945 on kernel 2.6.33 anymore
   WLAN_NEW=$(for i in /sys/class/net/* ; do ( [ -d $i/wireless ] || [ -d $i/phy80211 ] ) && basename $i ; done)
-  set -a WLAN_IWCONFIG=""
+  set -a WLAN_IWCONFIG
   for DEV in $LAN ; do
-      iwconfig $DEV 2>/dev/null 1>&2 && WLAN_IWCONFIG+="$DEV"
+    iwconfig $DEV 2>/dev/null 1>&2 && WLAN_IWCONFIG+=($DEV)
   done
-  WLAN=$(echo $WLAN_OLD $WLAN_NEW ${WLAN_IWCONFIG[*]} | sort -u)
+  WLAN=$(echo $WLAN_OLD $WLAN_NEW ${WLAN_IWCONFIG[@]} | tr ' ' '\n' | sort -u)
 fi
 
 unset LAN_DEVICES WLAN_DEVICES FIREWIRE_DEVICES NETDEVICES WLAN_IWCONFIG