Count of total votes placed allows non-integer values

In admin.php, my vote count now reads "There were 2 voters registered and 0.5 vote sets were validated by email tokens" after some fiddling around with test data in the db. I suspect that this is less likely when there isn't someone monkeying around with the backend in mid-poll, but still, a vote set should be discrete (and would probably be simplest as a count of auth tokens validated rather than calculated from # of questions answered).