720:/lib/skill_raise.c (/lib/skill_raise.c)
(int) sk_filter_learn(int sk, int steps)
/*
 * Function name: sk_filter_learn
 * Description:   Filter out what skills this player can learn
 * Arguments:     sk    - The skill
 *                steps - The number of steps play wants to learn
 * Returns:       1 if play can learn skill
 */
