how to make this function take the base vocation instead of the previous vocation?

[jonataxz]

void Party::updateVocationsList()
{
    std::set<uint32_t> vocationIds;

    uint32_t vocationId = leader->getVocation()->getFromVocation();
    if (vocationId != VOCATION_NONE) {
        vocationIds.insert(vocationId);
    }

    for (const Player* member : memberList) {
        vocationId = member->getVocation()->getFromVocation();
        if (vocationId != VOCATION_NONE) {
            vocationIds.insert(vocationId);
        }
    }

    size_t size = vocationIds.size();
    if (size > 1) {
        extraExpRate = static_cast<float>(size * (10 + (size - 1) * 5)) / 100.f;
    } else {
        extraExpRate = 0.20f;
    }
}