fix madwifi channel setting (#2073)

SVN-Revision: 8681

package/madwifi/files/lib/wifi/madwifi.sh

@@ -103,7 +103,7 @@ enable_atheros() {
 				*a) agmode=11a;;
 				*) agmode=auto;;
 			esac
-			iwconfig "$ifname" channel 0 >/dev/null 2>/dev/null 
+			iwconfig "$ifname" channel "$channel" >/dev/null 2>/dev/null 
 			ifconfig "$ifname" up
 			sleep 1
 			iwpriv "$ifname" mode "$agmode"