wxGUI: missing parameter, throws error in Python 3

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@74103 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/web_services/dialogs.py

@@ -311,7 +311,7 @@ class WSDialogBase(wx.Dialog):
     def OnSettingsChanged(self, data):
         """Update widgets according to chosen settings"""
         # data list: [server, username, password]
-        if len < 3:
+        if len(data) < 3:
             return
 
         self.server.SetValue(data[0])