bug#38875: 26.2; auto-save-list-file-name still created when auto-save-default is nil

[João Guerra]

> Like I said: it does disable creating the file for me.

Try `emacs -q -l test.el` with test.el:

(setq auto-save-default nil)

wait a bit and `~/.emacs.d/auto-save-list/.saves-<pid>-<hostname>~`
will be created.

Tried on
GNU Emacs 26.2 (build 1, x86_64-w64-mingw32) of 2019-04-13
and
GNU Emacs 27.0.60 (build 1, x86_64-w64-mingw32) of 2019-12-28