UltraRogue: fix inventory collision after save and restore. Inventory letters are based on "identifiers" stored in objects' o_ident field. Identifiers are allocated by get_ident(), which keeps a list of objects that have them, to avoid giving the same identifier to multiple objects. The list is not stored in the savefile, so after restore, get_ident() was not aware of existing identifiers. This resulted in picked-up objects having the same inventory letters as objects restored from the file. The restore code now adds all objects with identifiers to the list.

/*
 * Score file structure
 *
 * @(#)score.h	4.6 (Berkeley) 02/05/99
 *
 * Rogue: Exploring the Dungeons of Doom
 * Copyright (C) 1980-1983, 1985, 1999 Michael Toy, Ken Arnold and Glenn Wichman
 * All rights reserved.
 *
 * See the file LICENSE.TXT for full copyright and licensing information.
 */

struct sc_ent {
    uid_t sc_uid;
    int sc_score;
    unsigned int sc_flags;
    int sc_monster;
    char sc_name[MAXSTR];
    int sc_level;
    unsigned int sc_time;
};

typedef struct sc_ent SCORE;

void	rd_score(SCORE *top_ten);
void	wr_score(SCORE *top_ten);