PyCon/pycon — pull request #362 by rebecca-caktus (2014-12-12 15:52:19+00:00)
Title: Program export bugfix

```
File "pycon/program_export.py", line 188, in prepare_room
return ', '.join([r.name for r in presentation.slot.rooms])

AttributeError: 'NoneType' object has no attribute 'rooms'
```