Use bool for boolean in window.c

Use bool for boolean in window.c

* src/window.c:	Omit unnecessary static function decls.
(adjust_window_count, select_window, Fselect_window)
(window_body_width, Fwindow_body_height, Fwindow_body_width)
(set_window_hscroll, check_window_containing, Fwindow_at)
(Fwindow_end, Fset_window_start, Fpos_visible_in_window_p)
(unshow_buffer, replace_window, recombine_windows)
(add_window_to_list, candidate_window_p, next_window)
(Fnext_window, Fprevious_window, window_loop, check_all_windows)
(Fget_buffer_window, Fdelete_other_windows_internal)
(replace_buffer_in_windows_safely, set_window_buffer)
(Fset_window_buffer, Fforce_window_update)
(temp_output_buffer_show, make_parent_window)
(window_resize_check, window_resize_apply, Fwindow_resize_apply)
(resize_frame_windows, Fsplit_window_internal)
(Fdelete_window_internal, grow_mini_window, shrink_mini_window)
(Fresize_mini_window_internal, mark_window_cursors_off)
(window_scroll, window_scroll_pixel_based)
(window_scroll_line_based, scroll_command, Fscroll_other_window)
(Fscroll_left, Fscroll_right, displayed_window_lines, Frecenter)
(Fmove_to_window_line, Fset_window_configuration)
(delete_all_child_windows, apply_window_adjustment)
(set_window_fringes, set_window_scroll_bars)
(Fset_window_vscroll, foreach_window, foreach_window_1)
(compare_window_configurations, Fcompare_window_configurations):
Prefer 'bool', 'true', and 'false' for booleans.
* src/window.h (WINDOW_MODE_LINE_LINES)
(WINDOW_HEADER_LINE_LINES): Omit unnecessary "!!" on bool value.