[ESS] ESS default R not the newest (MS Windows)

[Stephen Eglen]

> It seems to me inferior-R-program-name should refer to the newest
> version of R, whether that version is user-specific or system-wide.
> By this I mean that when ESS starts up and fills in that variable, it
> should fill it in with the newest program path.

I disagree.  inferior-R-program-name should default to "R" -- most
likely the standard name on Unix.  This is a variable that you
customize, not that Emacs updates.

Stephen