Description of problem:
The new user dialog hangs due to an exception when creating a new user with
"Specify group ID manually" selected.

Version-Release number of selected component (if applicable):
system-config-users-1.2.56-1.fc7

How reproducible:
Everytime

Steps to Reproduce:
1.Click Add User button
2.Enter details for user.
3.Check "Specify group ID manually"
4.Click OK button.
  
Actual results:
The dialog just hangs. The follow python exception is outputted.

[root@rifter ~]# system-config-users 
Traceback (most recent call last):
  File "/usr/share/system-config-users/userWindow.py", line 289, in
on_userWin_ok_button_clicked
    if self.gidCheckButton.get_active ():
AttributeError: userWindow instance has no attribute 'gidCheckButton'

Expected results:
The new user is created.