ip link set wlan0 down ahead

at line 341,
`ip link set down dev ${VWIFI_IFACE} || die`
should be added to
`ip link set down dev ${VWIFI_IFACE} || die
ip link set down dev ${WIFI_IFACE} || die`
because at least on my machine, interface wlp5s0(just like wlan0) will be set up when wicd start(when X start).
therefore an error occurs
`RTNETLINK answers: Name not unique on network`
thank you