How to modify this alliance chain into a public chain？

[yangmiok]

if tally := snap.Tally[candidate]; tally.Votes > snap.ValSet.Size()/2 {
// if tally := snap.Tally[candidate]; tally.Votes > 0 {
if tally.Authorize {
logger.Info("BFT: reached majority to add validator")
snap.ValSet.AddValidator(candidate)
} else {
logger.Info("BFT: reached majority to remove validator")
snap.ValSet.RemoveValidator(candidate)

        // Discard any previous votes the deauthorized validator cast
        for i := 0; i < len(snap.Votes); i++ {
            if snap.Votes[i].Validator == candidate {
                // Uncast the vote from the cached tally
                snap.uncast(snap.Votes[i].Address, snap.Votes[i].Authorize)

                // Uncast the vote from the chronological list
                snap.Votes = append(snap.Votes[:i], snap.Votes[i+1:]...)

                i--
            }
        }
    }

I try to change tally.Votes > 0 to become a public chain，but fail？how

[baptiste-b-pegasys]

what is failing exactly?