extern int vl_setvec(register u_char *, register u_short *, u_char *,
int, register int, register int *);
/* wantupd.c */
+extern void update_policy_check(void);
extern int demand_update_want(int *, int *, int);
extern int update_maxmissed(void);
extern int demandupdatecheck(void);
#endif
extern int file_lock(int);
extern int file_unlock(int);
+extern int diffx(int, int);
+extern int diffy(int, int);
extern int deltax(int, int);
extern int deltay(int, int);
extern int mapdist(int, int, int, int);
extern void takeover_land(register struct lndstr *, natid, int);
extern void takeover(register struct sctstr *, natid);
extern void takeover_ship(register struct shpstr *, natid, int);
+extern void takeover_plane(register struct plnstr *, natid);
/* trdsub.c */
extern int trade_check_ok(int, struct trdstr *, union trdgenstr *);
extern s_char *trade_nameof(struct trdstr *, union trdgenstr *);