liqd/adhocracy — pull request #513 by phihag (2013-07-31 08:27:25+00:00)
Title: Do not allow voting in frozen instances

Currently, users can still vote in an instance that has been marked as frozen. Since voting can have significant changes on the appraisal of the content, it should not be allowed in frozen instances.
Fixes hhucn/adhocracy.hhu_theme#422

This just copies the check from `auth/proposal.py` to `auth/poll.py`.