be more consistent with coordinates

src/invent.c

@@ -1199,7 +1199,7 @@ freeinv(struct obj *obj)
 
 /* drawbridge is destroying all objects at <x,y> */
 void
-delallobj(int x, int y)
+delallobj(coordxy x, coordxy y)
 {
     struct obj *otmp, *otmp2;
 
@@ -1252,7 +1252,7 @@ delobj_core(
 
 /* try to find a particular type of object at designated map location */
 struct obj *
-sobj_at(int otyp, int x, int y)
+sobj_at(int otyp, coordxy x, coordxy y)
 {
     register struct obj *otmp;
 
@@ -1384,7 +1384,7 @@ o_on(unsigned int id, struct obj *objchn)
 }
 
 boolean
-obj_here(struct obj *obj, int x, int y)
+obj_here(struct obj *obj, coordxy x, coordxy y)
 {
     register struct obj *otmp;
 
@@ -1395,7 +1395,7 @@ obj_here(struct obj *obj, int x, int y)
 }
 
 struct obj *
-g_at(int x, int y)
+g_at(coordxy x, coordxy y)
 {
     register struct obj *obj = g.level.objects[x][y];
 
@@ -3997,7 +3997,7 @@ dotypeinv(void)
 /* return a string describing the dungeon feature at <x,y> if there
    is one worth mentioning at that location; otherwise null */
 const char *
-dfeature_at(int x, int y, char *buf)
+dfeature_at(coordxy x, coordxy y, char *buf)
 {
     struct rm *lev = &levl[x][y];
     int ltyp = lev->typ, cmap = -1;
@@ -5335,7 +5335,7 @@ only_here(struct obj *obj)
  * Currently, this is only used with a wand of probing zapped downwards.
  */
 int
-display_binventory(int x, int y, boolean as_if_seen)
+display_binventory(coordxy x, coordxy y, boolean as_if_seen)
 {
     struct obj *obj;
     menu_item *selected = 0;