Re: [O] Wrong number of arguments: setq, 1

[Kaushal Modi]

I just found a recent conversation on this mailing list with the
title: Concerning `(letrec ((ignore)) ...)' in line 2718 of lisp/ox.el

That explains why I suddenly started seeing these errors.
My above patch fixes org exports for me while being on the latest
snapshot of emacs-25 branch.