* utils.c (set_width_command): Remove prototypes.

* utils.c (set_width_command): Remove prototypes.
(set_screen_size): New prototype.
(init_page_info): Simplify by fetching the screen size from
Readline.  Call set_screen_size.
(set_screen_size): New function.
(set_width): Add missing whitespace in comment.
(set_width_command): Call set_screen_size.
(set_height_command): New function.
(initialize_utils): Fix formatting.  Make "set height" command
call set_height_command.  Remove redundant code that turns off
pagination if output isn't a terminal.  Remove redundant call to
set_width_command.