bug#62674: vc-next-action prints error message: "Cannot open load file: No such file or directory, vc-nil

[Eli Zaretskii]

> Date: Tue, 11 Apr 2023 04:53:49 +0300
> From: Dmitry Gutov <dmitry@gutov.dev>
> 
> > vc-next-action prints an error message:
> > C-x v v yes RET
> > 
> > Cannot open load file: No such file or directory, vc-nil
> 
> The patch below seems to fix this particular scenario.
> 
> I'm not sure we want to expend much effort on supporting CVS this day 
> and age, but if the one-liner change is enough, all the better.

Thanks.  If this solves the problem, it's okay to install it on the
emacs-29 branch.