(dumpglyphs): When HL=2, check explicitly for using

(dumpglyphs): When HL=2, check explicitly for using
the frame's default font or not.

(XTread_socket): For UnmapNotify, use x_any_window_to_frame.

(x_set_offset): New arg CHANGE_GRAVITY.
(x_make_frame_visible): Pass new arg.

(x_wm_set_size_hint): Args spec_x and spec_y deleted.
(x_set_offset, x_set_window_size): Don't pass those args.

(x_destroy_window): Just clear out mouse_face... vars.

(x_wm_set_size_hint): Use win_gravity from frame.

(x_make_frame_visible): Call x_set_offset.