py: When printf'ing an object as a pointer, pass the concrete pointer.

extmod/vfs_fat_file.c

@@ -77,7 +77,7 @@ typedef struct _pyb_file_obj_t {
 
 STATIC void file_obj_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
     (void)kind;
-    mp_printf(print, "<io.%s %p>", mp_obj_get_type_str(self_in), self_in);
+    mp_printf(print, "<io.%s %p>", mp_obj_get_type_str(self_in), MP_OBJ_TO_PTR(self_in));
 }
 
 STATIC mp_uint_t file_obj_read(mp_obj_t self_in, void *buf, mp_uint_t size, int *errcode) {

py/objtype.c

@@ -232,7 +232,7 @@ STATIC void instance_print(const mp_print_t *print, mp_obj_t self_in, mp_print_k
     }
 
     // TODO: CPython prints fully-qualified type name
-    mp_printf(print, "<%s object at %p>", mp_obj_get_type_str(self_in), self_in);
+    mp_printf(print, "<%s object at %p>", mp_obj_get_type_str(self_in), self);
 }
 
 mp_obj_t mp_obj_instance_make_new(const mp_obj_type_t *self, size_t n_args, size_t n_kw, const mp_obj_t *args) {