Fix anim_obj x/y values

- negative values have no meaning
- left in optional tile x/y for backwards compatibility

macros/scripts/battle_anims.asm

@@ -11,10 +11,17 @@ ENDM
 	enum anim_obj_command ; $d0
 anim_obj: MACRO
 	db anim_obj_command
-	db \1 ; obj
-	db (\2 << 3) + \3 ; x
-	db (\4 << 3) + \5 ; y
+if _NARG <= 4
+	db \1 ; object
+	db \2 ; x
+	db \3 ; y
+	db \4 ; param
+else
+	db \1 ; object
+	db (\2) * 8 + (\3) ; x_tile, x
+	db (\4) * 8 + (\5) ; y_tile, y
 	db \6 ; param
+endc
 ENDM
 
 	enum anim_1gfx_command ; $d1