loman: don't report error when adding an exact duplicate.

bin/loman.py

 #!/usr/bin/python
 
 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """This module allows adding and deleting of projects to the local manifest."""
 
 import sys
 import optparse
@@ skipping 25 matching lines @@
 
   def AddWorkonProject(self, name, path):
     """Add a new workon project if it is not already in the manifest.
 
     Returns:
       True on success.
     """
 
     for project in self._root.findall('project'):
         if project.attrib['path'] == path or project.attrib['name'] == name:
+          if project.attrib['path'] == path and project.attrib['name'] == name:
+            return True
+          else:
             return False
     self._AddProject(name, path, workon='True')
     return True
 
   def _AddProject(self, name, path, workon='False'):
     element = ElementTree.Element('project', name=name, path=path,
                                   workon=workon)
     element.tail = '\n'
     self._root.append(element)
 
@@ skipping 31 matching lines @@
       Die('Path "%s" or name "%s" already exits in the manifest.' %
           (path, name))
   try:
     print >> open(local_manifest, 'w'), ptree.ToString()
   except Exception, e:
     Die('Error writing to manifest: %s' % e)
 
 
 if __name__ == '__main__':
   main(sys.argv)