Document refcount of json_tokener_parse_ex return

json_tokener.h

@@ -155,9 +155,10 @@ JSON_EXPORT void json_tokener_set_flags(struct json_tokener *tok, int flags);
  * called.
  *
  * When a valid JSON value is parsed, a non-NULL json_object will be
- * returned.  Also, json_tokener_get_error() will return json_tokener_success.
- * Be sure to check the type with json_object_is_type() or
- * json_object_get_type() before using the object.
+ * returned, with a reference count of one which belongs to the caller.  Also,
+ * json_tokener_get_error() will return json_tokener_success. Be sure to check
+ * the type with json_object_is_type() or json_object_get_type() before using
+ * the object.
  *
  * @b XXX this shouldn't use internal fields:
  * Trailing characters after the parsed value do not automatically cause an