Something

Index: network
===================================================================
--- network     (revision 8143)
+++ network     (working copy)
@@ -9,6 +9,8 @@
 
        include /lib/network
        setup_switch
+       [ -s /etc/config/wireless ] || \
+               rm -f /etc/config/wireless
        [ -e /etc/config/wireless ] || \
                /sbin/wifi detect > /etc/config/wireless
        /sbin/wifi up