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);
-extern bool get_is_floor(int x, int y);
-extern void set_floor(int x, int y);
+extern bool get_is_floor(POSITION x, POSITION y);
+extern void set_floor(POSITION x, POSITION y);