Fix error when private init.el doesn't exist
Fix error when private init.el doesn't exist

Found in doom-initialize-packages, which DOOM calls in many
noninteractive functions.

aminb/.emacs.d,hlissner/.emacs.d,hlissner/.emacs.d,aminb/.emacs.d,aminb/.emacs.d,hlissner/.emacs.d,hlissner/.emacs.d,hlissner/doom-emacs,UndeadKernel/emacs_doom,aminb/.emacs.d,UndeadKernel/emacs_doom,aminb/.emacs.d,hlissner/doom-emacs,UndeadKernel/emacs_doom,hlissner/doom-emacs,hlissner/doom-emacs,aminb/.emacs.d,aminb/.emacs.d,UndeadKernel/emacs_doom,UndeadKernel/emacs_doom,hlissner/.emacs.d,hlissner/.emacs.d,hlissner/doom-emacs,hlissner/doom-emacs,hlissner/.emacs.d,UndeadKernel/emacs_doom,UndeadKernel/emacs_doom,aminb/.emacs.d,hlissner/doom-emacs,hlissner/.emacs.d