extern bool los(player_type *player_ptr, POSITION y1, POSITION x1, POSITION y2, POSITION x2);
extern bool projectable(player_type *player_ptr, POSITION y1, POSITION x1, POSITION y2, POSITION x2);
-extern int project_length;
extern void vault_monsters(player_type *player_ptr, POSITION y1, POSITION x1, int num);
extern bool cave_valid_bold(floor_type *floor_ptr, POSITION y, POSITION x);
extern bool fire_crimson(player_type *shooter_ptr);
extern bool tele_town(player_type *caster_ptr);
extern bool is_teleport_level_ineffective(player_type *caster_ptr, MONSTER_IDX idx);
-extern int project_length;