fixed a couple of bugs:

wnettools.py: DetectWirelessInterfaces() didn't return the wireless interface
daemon.py: GetGlobalDNSAddresses() now returns a blank string instead of None for blank addresses; None could not be sent over dbus

daemon.py

@@ -358,7 +358,7 @@ class ConnectionWizard(dbus.service.Object):
     def GetGlobalDNSAddresses(self):
         '''returns the global dns addresses'''
         print 'returning global dns addresses to client'
-        return (self.dns1,self.dns2,self.dns3)
+        return (misc.noneToString(self.dns1),misc.noneToString(self.dns2),misc.noneToString(self.dns3))
     #end function GetWirelessInterface
     
     @dbus.service.method('org.wicd.daemon')

networking.py

@@ -287,7 +287,7 @@ class Wireless(Controller):
         The first available wireless interface.
         
         """
-        wnettools.GetWirelessInterfaces()
+        return wnettools.GetWirelessInterfaces()
 
 
     def Disconnect(self):