[O] call_*() is not working inside #+DATE

[Rafael Laboissiere]

The following used to work for me in the past:

   #+NAME: date
   #+BEGIN_SRC sh :results silent :exports results :tangle no
   date
   #+END_SRC
   #+TITLE: Sample
   #+AUTHOR: Me
   #+DATE: call_date()

and I saw the output of the shell command "date" when exporting the file 
to LaTeX.  However does not work for the current HEAD of the Git 
repository.

Using git-bisect, I discovered that the culprit is commit 85ff663, i.e. 
my code above works for commit 85ff663^ but fails for commit 85ff663.

Commit 85ff663 was a pretty large commit and, besides that, the new code 
introduced by it was posteriorly changed, so it is hard to find where the 
bug comes from.  Could someone more acquainted with the code try to look 
at this bug, please?

Thanks,

Rafael Laboissière