Description of problem:

When one unchecks the "Encrypt root password" box, the "Save" and "Preview" File
menu options become unresponsive.

Version-Release number of selected component (if applicable):

2.6.6.4

How reproducible:

This only happens when the password isn't to be saved encrypted.

Steps to Reproduce:
1. Enter config, including root password.
2. Uncheck "encrypt root password".
3. Attempt to Save or Preview the config.
  
Actual results:

No pop-up with the config and/or no config saved.

On the controlling terminal, however, one sees:

Traceback (most recent call last):
 File "/usr/share/system-config-kickstart/kickstartGui.py", line 293, in
on_activate_preview_options
   if self.getAllData() != None:
 File "/usr/share/system-config-kickstart/kickstartGui.py", line 237, in getAllData
   if self.basic_class.formToKsdata(doInstall) is None:
 File "/usr/share/system-config-kickstart/basic.py", line 202, in formToKsdata
   self.ksdata.rootpw["password"] = pure
UnboundLocalError: local variable 'pure' referenced before assignment 


Expected results:

Pop-up dialog with config or file chooser asking where to save config.

Additional info:

See proposed fix.