Simply display zero if it's less or equals to 0.
{
        case Protocol::Server::PartUUIDs:
            return true;
        case Protocol::Server::Data:
            if (!cancelled_)
                onData(packet.block, parsed_query
            return true;
        case Protocol::Server::Progress:
            onProgress(packet.progress
            return true;
        case Protocol::Server::ProfileInfo:
            onProfileInfo(packet.profile_info
            return true;
        case Protocol::Server::Totals:
            if (!cancelled_)
                onTotals(packet.block, parsed_query
            return true;
        case Protocol::Server::Extremes:
            if (!cancelled_)
                onExtremes(packet.block, parsed_query
            return true;
        case Protocol::Server::Exception:
            onReceiveExceptionFromServer(std::move(packet.exception)
            return false;
        case Protocol::Server::Log:
            onLogData(packet.block
            return true;
        case Protocol::Server::EndOfStream:
            onEndOfStream(
            return false;