The first switch case is default case. Then it will only
match default case. cause not update the lan/wan mac address.
And in the default switch case the param lan_mac is empty.
it will case error message 'arithmetic syntax error' when
call macaddr_add function.
Signed-off-by: michael lee <igvtee@gmail.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@40910 3c298f89-4303-0410-b956-a3cf2f4a3e73