Work around a bash evaluation error

net.Linux/iwconfig.sh

@@ -430,7 +430,8 @@ iwconfig_scan() {
 				eval a=\$QUALITY_${i}
 				eval b=\$QUALITY_${k}
 				local u=${k}
-		    	[ -n "${a}" -a -n "${b}" -a "${a}" -lt "${b}" ] && u=${i}
+				# We need to split this into two tests, otherwise bash errors 
+				[ -n "${a}" -a -n "${b}" ] && [ "${a}" -lt "${b}" ] && u=${i}
 				unset MAC_${u} SSID_${u} CHAN_${u} QUALITY_${u} ENC_${u}
 			fi
 			k=$((${k} + 1))