(x_setup_relief_colors): Don't compute an image's

(x_setup_relief_colors): Don't compute an image's
background color if it doesn't have a Pixmap.
(notice_overwritten_cursor): Don't depend on
output_cursor and updated_area.  Compare pixel coordinates with
window's cursor pixel coordinates.
(x_draw_glyphs, x_clear_end_of_line, show_mouse_face): Call
notice_overwritten_cursor with new arg list.
(show_mouse_face): Fix bug setting a row's mouse_face_p flag
unconditionally.
(x_draw_image_relief): Use predefined macro instead of
constant when the value of `tool_bar_button_relief' is negative.

(x_display_and_set_cursor): Fix PostMessage arg types.