extern struct frame *last_mouse_frame;
extern int last_tool_bar_item;
extern int mouse_autoselect_window;
+extern int unibyte_display_via_language_environment;
+
extern void reseat_at_previous_visible_line_start P_ ((struct it *));
extern int calc_pixel_width_or_height P_ ((double *, struct it *, Lisp_Object,