/* Decrease if needed */
    if (div > 0) i->prod_level = max(i->prod_level / (2 << (div - 1)), (int)PRODLEVEL_MINIMUM);
    if (i->prod_level == PRODLEVEL_MINIMUM) {
        closeit = true;
    } else {
        recalculate_multipliers = true;
        if (str == STR_NULL) str = indspec->production_down_text;
    }

    while (div-- != 0 && !closeit) {
        if (i->prod_level == PRODLEVEL_MINIMUM) {
            closeit = true;
        } else {
            i->prod_level = max(i->prod_level / 2, (int)PRODLEVEL_MINIMUM); // typecast to int required to please MSVC
            recalculate_multipliers = true;
            if (str == STR_NULL) str = indspec->production_down_text;
        }
    }