bug#20495: 24.5; invoking Hunspell with multiple dicts

[Eli Zaretskii]

> From: Arash Esbati <esbati@gmx.de>
> Date: Sun, 03 May 2015 10:11:17 +0200
> 
> Eli kindly explained to me here
> <http://thread.gmane.org/gmane.emacs.help/104130> that Hunspell does not
> support multiple languages, but it looks like a bug in `ispell.el'.

Actually, I see that I was mistaken: the code does try to load each
dictionary in turn with its affix file.  Nevertheless, I'm quite sure
such a combination misfired for me at some point; perhaps there's a
bug, or maybe ispell.el is the culprit, since it doesn't currently
support this mode (AFAIK).

In any case, the reaction of ispell.el in this case needs to be
improved.