Make fringe-drawing stuff compile without a window-system
* src/xdisp.c (Voverflow_newline_into_fringe)
(move_it_in_display_line_to, redisplay_internal)
(update_window_fringes, redisplay_window, display_line, window):
Add `#ifdef HAVE_WINDOW_SYSTEM' around fringe-drawing stuff, so
that it compiles without a window-system.
* src/dispnew.c (direct_output_for_insert, update_window): Likewise.