bug#12253: Restore window start position

[Drew Adams]

ping.

Any special reason why the patch provided or some other fix has not yet been
applied to fix this bug?  (Or has it been fixed and should thus be closed?)

> Sent: Saturday, January 19, 2013 7:04 AM
> > > +         isearch-win-pt-line (- (line-number-at-pos)
> > > +                                (line-number-at-pos 
> > (window-start)))
> > > ...
> > > !     (when isearch-win-pt-line (recenter isearch-win-pt-line)))
> > 
> > Why do you use `line-number-at-pos' and `recenter' instead of
> > `window-start' and `set-window-start'?
> 
> No special reason.  It's probably just what occurred to me.
> 
> Aren't they equivalent in effect, though not necessarily in 
> performance?  Feel free to use whichever approach you feel is better.