[O] #+bind options ignored during async export

[Julien Cubizolles]

The options specified by #+ keywords are set during asynchronous export
whereas those specified by the #+BIND: method aren't. In the following
example, org-latex-image-default-width is set to .25\linewidth only in
synchronous export whereas the author is set regardless of the type of
export.

--8<---------------cut here---------------start------------->8---
#+AUTHOR: myself
#+BIND: org-latex-image-default-width ".25\\linewidth"

* 1st heading
[[file:some_picture.png]]
--8<---------------cut here---------------end--------------->8---

I think both the #+KEYWORD: and #+BIND: should have the same behaviour
whereas one is using async export or not.

Julien.