Multidb raises exception if SLAVE_DATABASES is not defined in settings

[seocam]

There is a fallback implementation that's actually never called because it's missing the default param of getattr function. Here is what I'm talking about:

django-multidb-router/multidb/__init__.py

Line 43 in 86017d2

if getattr(settings, 'SLAVE_DATABASES'):

Instead of getattr(settings, 'SLAVE_DATABASES') if should be getattr(settings, 'SLAVE_DATABASES', None).

Another option that might be even better would be hasattr(settings, 'SLAVE_DATABASES').