(do_pending_window_change): Add parameter `safe'.

(do_pending_window_change): Add parameter `safe'.
(change_frame_size): Ditto.
(change_frame_size_1): Ditto.  Deley size changes if redisplaying
and not called from a safe place.
(window_change_signal): Call change_frame_size with new parameter.
(set_window_cursor_after_update): Do the
cursor_in_echo_area case only for a mini-window showing
a message.  Don't let cursor end up after the end of a row.
(adjust_frame_message_buffer): Removed references
to echo_area_glyphs and previous_echo_glyphs.
(direct_output_for_insert): Check for mini-window displaying
echo area message differently.
(update_frame): Likewise.
(set_window_cursor_after_update): Likewise.  In echo area,
don't try to set cursor on rows that aren't enabled.