fixed bug in test for days_per_month
fixed bug in test for days_per_month

git-svn-id: https://svn.zmaw.de/svn/pycmbs/trunk@504 46f1e1ae-ddaa-4461-89cc-888b818d8ef3

Former-commit-id: 23aa0483b309ea1f5d1d563e25ab4cd6181a6f4b
Former-commit-id: 8b782c4e7a6d5fc53c2b8851bf1ecd7d52510236
pygeo/pycmbs,pygeo/pycmbs