(unshow_buffer): Set PT with TEMP_SET_PT_BOTH.

(unshow_buffer): Set PT with TEMP_SET_PT_BOTH.

(Fset_window_buffer): Use set_marker_both.
(Fselect_window, Fscroll_other_window, save_window_save): Likewise.
(Fset_window_configuration): Pass p->mark itself to Fset_marker
and set_marker_restricted_both.
(temp_output_buffer_show): Use set_marker_restricted_both.
(window_scroll): Save and restore both kinds of pointers.

(Fdelete_other_windows): Rely on vmotion to give bytepos.
Use set_marker_both.  Use byte positions.
(Frecenter): Likewise.
(Fmove_to_window_line): Use set_marker_both and Fgoto_char.