What steps will reproduce the problem?
1. Create a .po file with no entries 
2.
3.

What is the expected output? What do you see instead?

Should probably return 100% raises a divide by 0 instead

What version of the product are you using? On what operating system?

SVN

Please provide any additional information below.

Fix: if total == 0: return 100

Note: originally reported here: 
http://code.google.com/p/django-rosetta/issues/detail?id=8