bug#50241: flyspell doesn't work with multiple dictionaries

[Konstantin Kharlamov]

Okay, I finally found the working combination, it is:

    (progn
      (require 'ispell)
      (setq ispell-program-name "hunspell")
      (ispell-set-spellchecker-params)
      (ispell-hunspell-add-multi-dic "ru_RU,en_US")
      (ispell-change-dictionary "ru_RU,en_US")
      (flyspell-mode 1)
      )

So, the magical function is `(ispell-set-spellchecker-params)`. Judging by its 
description, it has to be called before any ispell usage.

I can probably call it manually, but I presume the behaviour needs fixing.

I think perhaps, should ispell have a global variable like 
`ispell-initialized`, which then would be set in 
(ispell-set-spellchecker-params). And then the variable would be checked in 
`ispell-hunspell-add-multi-dic`, and if it wasn't set, throw an exception 
"Ispell wasn't initialized. Please call `(ispell-set-spellchecker-params)'"?