setup.exe patch: show root dir warning only once

[Christopher Faylor]

On Fri, Sep 18, 2009 at 08:54:42PM +0100, Andy Koppe wrote:
>* root.cc: Show warning against installing Cygwin into disk root only
>if the root directory has actually been changed. Add orig_root_dir
>variable for this purpose.
>* res.rc: Make the root dir warning a bit more meaningful, and refrain
>from shouting.

Thanks for the patch.

Applied with a minor ChangeLog tweak.

cgf