configurehood: Leverage -H option for batctl

Since batctl can suppress headers, we do not have to count lines.

Cosmetical change.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Reviewed-by: Fabian Bläse <fabian@blaese.de>
Reviewed-by: Robert Langhammer <rlanghammer@web.de>

src/packages/fff/fff-hoods/files/usr/sbin/configurehood

@@ -22,7 +22,7 @@ rm -f "$hoodfiletmp"
 
 # Gatewaycheck function
 isGatewayAvailable() {
-	if [ "$(batctl gwl | wc -l)" -gt 2 ]; then
+	if [ -n "$(batctl gwl -H)" ]; then
 		return 0
 	else
 		return 1