[patch] fix ox-latex async export bug

[Rasmus]

Hi there,

When I try to export documents asynchronously with ox-latex, I always get
a bug in the “org-export-processFOO” files. The last sexp is always something 
like this: 

    (funcall '#<subr F616e6f6e796d6f75732d6c616d626461_anonymous_lambda_83> 
"test.tex")

where the “#” and “’” are mixed around. This happens even with a very
simple ‘org-export-async-init-file’ just loading ELPA Org.

This was previously reported here:

    https://lists.gnu.org/archive/html/emacs-orgmode/2021-06/msg00422.html

Nicolas’ fix (replicated in this patch) seems to fix it.
I don’t really understand why this bug happens to be honest.

This happens both on my GNU/Linux system (Emacs v29) and my work Windows
PC (Emacs v28 or v29) [all pre-releases, obviously].

Thanks,
Rasmus

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If you can mix business and politics wonderful things can happen!

0001-org-latex-export-to-pdf-Avoid-using-lambda-function.patch
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