Mailin trace is broken on staging

[Chris Rossi]

https://karlstaging.gocept.com/communities/mailin-trace/blog

          Traceback (most recent call last):
  File "/srv/karlstaging/staging/63/eggs/pyramid-1.2.1-py2.6.egg/pyramid/tweens.py", line 17, in excview_tween
    response = handler(request)
  File "/srv/karlstaging/staging/63/eggs/pyramid_tm-0.5-py2.6.egg/pyramid_tm/__init__.py", line 107, in tm_tween
    return response
  File "/srv/karlstaging/staging/63/eggs/pyramid_tm-0.5-py2.6.egg/pyramid_tm/__init__.py", line 75, in __exit__
    return self._retry_or_raise(t, v, tb)
  File "/srv/karlstaging/staging/63/eggs/pyramid_tm-0.5-py2.6.egg/pyramid_tm/__init__.py", line 60, in _retry_or_raise
    reraise(t, v, tb) # otherwise reraise the exception
  File "/srv/karlstaging/staging/63/eggs/pyramid_tm-0.5-py2.6.egg/pyramid_tm/__init__.py", line 100, in tm_tween
    response = handler(request)
  File "/srv/karlstaging/staging/63/eggs/pyramid-1.2.1-py2.6.egg/pyramid/router.py", line 153, in handle_request
    response = view_callable(context, request)
  File "/srv/karlstaging/staging/63/eggs/pyramid-1.2.1-py2.6.egg/pyramid/config/views.py", line 186, in _secured_view
    return view(context, request)
  File "/srv/karlstaging/staging/63/eggs/pyramid-1.2.1-py2.6.egg/pyramid/config/views.py", line 292, in rendered_view
    result = view(context, request)
  File "/srv/karlstaging/staging/63/src/karl/karl/content/views/blog.py", line 165, in show_mailin_trace_blog
    if os.path.exists(path):
  File "/srv/karlstaging/staging/63/lib/python2.6/genericpath.py", line 18, in exists
    st = os.stat(path)
TypeError: coercing to Unicode: need string or buffer, NoneType found

[Chris Rossi (chris-archimedeanco)]

Added configuration to osideploy and redeployed to staging.