615:/lib/messenger.c (/lib/messenger.c)
(public void) hook_cannot_deliver_player_unavailable(string who)
/*
 * Function:    hook_cannot_deliver_player_unavailable
 * Description: Hook that gets called to display that the messenger cannot
 *              deliver to someone who is not in the game. Set a notify_fail()
                message.
 * Arguments:   string who - name of the recipient.
 */
