Re: 'struct window' cleanup #4

[Stefan Monnier]

> Do we have a consensus about type(s) of 'window_end_vpos', 'vscroll',
> 'hscroll' and 'min_hscroll' fields of 'struct window'?  Now I'm just
> assuming that ptrdiff_t is safer.  Eli, please review if possible.

vscroll should be int, as should be the hscroll amounts.
The vpos probably as well.  `ptrdiff' is for things like
buffer-positions (and it's only meaningful for the --with-wide-int
compilation option which I tend to consider as a waste of time).


        Stefan