Code review comment for lp:~vila/bzr/609186-shortcuts

There are multiple failures like this:

Traceback (most recent call last):
 File "/usr/lib/python2.4/site-packages/testtools/runtest.py", line 128, in _run_user
   return fn(*args)
 File "/usr/lib/python2.4/site-packages/testtools/testcase.py", line 368, in _run_test_method
   testMethod()
 File "/home/pqm/bzr-pqm-workdir/home/+trunk/bzrlib/plugins/launchpad/test_lp_directory.py", line 466, in test_ubuntu_d_distroseries_expansion
   self.assertURL('ubuntu/dapper/foo', 'ubuntu:d/foo', series='dapper')
 File "/home/pqm/bzr-pqm-workdir/home/+trunk/bzrlib/plugins/launchpad/test_lp_directory.py", line 383, in assertURL
   self.directory._resolve(shortcut, factory))
 File "/home/pqm/bzr-pqm-workdir/home/+trunk/bzrlib/plugins/launchpad/lp_directory.py", line 77, in _resolve
   if result.scheme in ('ubuntu', 'debianlp'):
AttributeError: 'tuple' object has no attribute 'scheme'