engine-extension-test.TestExtensionHooks fails in today's lp:zeitgeist

[Markus Korn]

markus@thekorn /tmp/zeitgeist % bzr revno
1630

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ERROR: testGetHook (engine-extension-test.TestExtensionHooks)
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Traceback (most recent call last):
  File "/tmp/zeitgeist/test/engine-extension-test.py", line 139, in testGetHook
    events = self.engine.get_events(ids)
  File "/tmp/zeitgeist/test/../_zeitgeist/engine/main.py", line 197, in get_events
    sorted_events[id_hash[event.id]] = event
AttributeError: 'NoneType' object has no attribute 'id'

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