if (stealth < 0)
        stealth = 0;

    stealth = std::max(0, stealth);

}                               // end check_stealth()

}

        if (you.equip[EQ_BODY_ARMOUR] != -1
            && random2( item_mass( you.inv[you.equip[EQ_BODY_ARMOUR]] )) >= 100)

        // diminishing returns for stealth training by waiting
        if ((you.equip[EQ_BODY_ARMOUR] == -1
            || you.equip[EQ_BODY_ARMOUR] != -1
                && random2(item_mass(you.inv[you.equip[EQ_BODY_ARMOUR]])) < 100)
            && you.skills[SK_STEALTH] <= 2 + random2(3) && one_chance_in(18))

            return;

             exercise(SK_STEALTH, 1);

        // diminishing returns for Stealth training by waiting
        if (you.skills[SK_STEALTH] <= 2 + random2(3) && one_chance_in(18))
            exercise(SK_STEALTH, 1);