bug#24970: 26.0.50; (void-function file-name-case-insensitive-p)

[Eli Zaretskii]

> From: Sam Steingold <sds@gnu.org>
> Date: Sun, 20 Nov 2016 12:55:40 -0500
> 
> trying to rename a file in dired:
> 
> Debugger entered--Lisp error: (void-function file-name-case-insensitive-p)
>   
> file-name-case-insensitive-p("/Users/sds/src/clear/algorithm/lib/getwit/11157-1479661083-out")
>   dired-do-create-files(move dired-rename-file "Move" nil t "Rename")
>   dired-do-rename(nil)
>   funcall-interactively(dired-do-rename nil)
>   call-interactively(dired-do-rename nil nil)
>   command-execute(dired-do-rename)
> 
> 
> In GNU Emacs 26.0.50.10 (x86_64-apple-darwin16.1.0, NS appkit-1504.60 Version 
> 10.12.1 (Build 16B2555))
>  of 2016-11-12 built on clr-sds
      ^^^^^^^^^^
That's an old build, please update and rebuild.  The function should
definitely be available on Darwin.