fix error output of brctl if bridging is not supported.

The following error is displayed during network configuration on any device that has DEVICE_TYPE set to something else then router, or has brctl functionality disabled through some other method:

"brctl: SIOCGIFBR: Package not installed"

This is due to the unbridge function being called, which uses "brctl show" to determine if the interface is bridged.

Signed-off-by: Ithamar R. Adema <ithamar.adema@team-embedded.nl>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20218 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/base-files/files/lib/network/config.sh

@@ -337,7 +337,7 @@ unbridge() {
 	local brdev
 
 	[ -x /usr/sbin/brctl ] || return 0
-	brctl show | grep "$dev" >/dev/null && {
+	brctl show 2>/dev/null | grep "$dev" >/dev/null && {
 		# interface is still part of a bridge, correct that
 
 		for brdev in $(brctl show | awk '$2 ~ /^[0-9].*\./ { print $1 }'); do