bug#33295: Unhandled error in log-view-find-revision

[Juri Linkov]

Version: 27.1

> vc-find-backend-function: Cannot open load file: No such file or directory, 
> vc-nil
>
> and with non-nil ‘debug-on-error’ shows a backtrace that refers to 
> ‘require(vc-nil)’.
>
> This is because the value of ‘log-view-vc-fileset’ in that *vc-change-log* 
> buffer
> is a directory.
>
> This patch changes it to display a nicer error:

Fixed.