bug#2233: viper-mode cursor color does not reset to red

[Chong Yidong]

Hi Michael, could you take a look at this bug report (2233 in the bug
tracker)?  Thanks.

> if your present cursor color (the default is set in
> `default-frame-alist') is the same as
> `viper-replace-overlay-cursor-color' (by default: "Red"), then Viper
> forgets to save it before switching to insert mode.
>
> The solution would be to implement `viper-save-cursor-color' cleanly,  
> unless that's already been done for Emacs 23 (haven't checked).
>
> On 7 Feb 2009, at 08:48, Nathan Sanders wrote:
>
> > After loading viper-mode, the cursor turns green when in Insert mode.
> > It is supposed to return to red when Esc is pressed to return to VI
> > mode. It does not. This occurs whether starting viper-mode
> > interactively after emacs starts, or when .emacs consists solely of
> >
> > (setq viper-mode t)
> > (require 'viper)