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diff -up system-config-printer-1.1.16/jobviewer.py.auth-no-pw system-config-printer-1.1.16/jobviewer.py
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--- system-config-printer-1.1.16/jobviewer.py.auth-no-pw	2009-12-22 14:44:19.000000000 +0000
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+++ system-config-printer-1.1.16/jobviewer.py	2010-01-07 15:40:43.517049465 +0000
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@@ -1,6 +1,6 @@
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-## Copyright (C) 2007, 2008, 2009 Tim Waugh <twaugh@redhat.com>
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-## Copyright (C) 2007, 2008, 2009 Red Hat, Inc.
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+## Copyright (C) 2007, 2008, 2009, 2010 Red Hat, Inc.
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+## Author: Tim Waugh <twaugh@redhat.com>
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 ## This program is free software; you can redistribute it and/or modify
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 ## it under the terms of the GNU General Public License as published by
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@@ -599,13 +599,12 @@ class JobViewer (GtkGUI, monitor.Watcher
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                 # Find out which auth-info is required.
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                 try_keyring = USE_KEYRING
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-                keyring_attrs = None
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+                keyring_attrs = dict()
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                 auth_info = None
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                 if try_keyring and 'password' in auth_info_required:
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                     auth_info_required = data.get ('auth-info-required', [])
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                     device_uri = data.get ("device-uri")
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                     (scheme, rest) = urllib.splittype (device_uri)
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-                    keyring_attrs = dict ()
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                     if scheme == 'smb':
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                         uri = smburi.SMBURI (uri=device_uri)
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                         (group, server, share,