bug#52554: 28.0.90; mm-inline-media-tests customization breaks .emacs reading

[Eli Zaretskii]

> From: Robert Pluim <rpluim@gmail.com>
> Cc: 52554@debbugs.gnu.org
> Date: Thu, 16 Dec 2021 16:46:36 +0100
> 
>     Eli> Perhaps we should bind inhibit-null-byte-detection to a non-nil value
>     Eli> while loading the init file?
> 
> The init file and 'custom-file'?

Yep.