marrow/marrow.mailer — pull request #50 by dsx (2012-10-18 20:57:14+00:00)
Title: Fixed traceback with debugging logger

Armoured against this:

```python
2012-10-18 16:11:53,090 INFO [marrow.mailer.manager.dynamic][MainThread] Dynamic manager starting up.
Traceback (most recent call last):
File "/some/path/bin/mailer-daemon", line 9, in
load_entry_point('superproject==0.0', 'console_scripts', 'mailer-daemon')()
File "/some/path/superproject/scripts/mailer.py", line 112, in main
mailer.start()
File "/some/path/lib/python2.7/site-packages/marrow/mailer/__init__.py", line 118, in start
self.manager.startup()
File "/some/path/lib/python2.7/site-packages/marrow/mailer/manager/dynamic.py", line 169, in startup
log.debug("Starting thread pool with %d workers." % (workers, ))
TypeError: %d format: a number is required, not str
```