extern void vault_trap_aux(POSITION y, POSITION x, POSITION yd, POSITION xd);
extern void vault_traps(POSITION y, POSITION x, POSITION yd, POSITION xd, int num);
-extern void correct_dir(int *rdir, int *cdir, int y1, int x1, int y2, int x2);
+extern void correct_dir(int *rdir, int *cdir, POSITION y1, POSITION x1, POSITION y2, POSITION x2);
extern void rand_dir(int *rdir, int *cdir);