Re: 'struct window' cleanup #2

[Stefan Monnier]

> For a `struct window', changing the type of `last_point', `last_modified'
> and `last_overlay_modified' from Lisp_Object to appropriate integral
> value eliminates a lot of useless Lisp_Object <-> {EMACS_INT, ptrdiff_t}
> conversions in a window and redisplay code; and, of course, lesser 
> Lisp_Objects
> means a bit faster GC. OK to install?

hscroll and min_hscroll are good candidates as well.


        Stefan