gcl change <change> was broken when creating a new change list.

gcl.py

 #!/usr/bin/python
 # Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 #
 # Wrapper script around Rietveld's upload.py that groups files into
 # changelists.
 
 import getpass
 import os
@@ skipping 393 matching lines @@
         changelist doesn't exist.
       update_status: if True, the svn status will be updated for all the files
         and unchanged files will be removed.
 
     Returns: a ChangeInfo object.
     """
     info_file = GetChangelistInfoFile(changename)
     if not os.path.exists(info_file):
       if fail_on_not_found:
         ErrorExit("Changelist " + changename + " not found.")
-      return ChangeInfo(changename)
+      return ChangeInfo(changename, 0, 0, '', None)
     split_data = ReadFile(info_file).split(ChangeInfo._SEPARATOR, 2)
     if len(split_data) != 3:
       ErrorExit("Changelist file %s is corrupt" % info_file)
     items = split_data[0].split(',')
     issue = 0
     patchset = 0
     if items[0]:
       issue = int(items[0])
     if len(items) > 1:
       patchset = int(items[1])
@@ skipping 732 matching lines @@
     # the files. This allows commands such as 'gcl diff xxx' to work.
     args =["svn", command]
     root = GetRepositoryRoot()
     args.extend([os.path.join(root, x) for x in change_info.FileList()])
     RunShell(args, True)
   return 0
 
 
 if __name__ == "__main__":
   sys.exit(main())