Ignore errors if display-buffer ALIST is malformed
Ignore errors if display-buffer ALIST is malformed

The gud.el library uses display-buffer incorrectly, by passing a list of
functions as its second argument, instead of as a nested list.

CORRECT:
  (display-buffer buffer
    '((display-buffer-reuse-window
       display-buffer-in-previous-window
       display-buffer-same-window display-buffer-pop-up-window)))

INCORRECT (how gud does it):
  (display-buffer buffer
    '(display-buffer-reuse-window
      display-buffer-in-previous-window
      display-buffer-same-window display-buffer-pop-up-window))

This causes "wrong-type-argument: listp
display-buffer-in-previous-window" error. However, it appears Emacs
handles malformed alists by just ignoring them, so Doom will do the
same.

Reported by @maskray

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