effect Creature::get_effect(efftype_id eff_id, body_part bp) const
{
    if(effects.find(eff_id) != effects.end()) {
        if (effects[eff_id].find((int)bp) != effects[eff_id].end()) {
            return effects[eff_id][(int)bp];
        }
    }
    return effect();
}