[TYPO3] seo_basics and PHP error "cannot use string offset as an array"

[Andrew Plank]

> 
> And what if configuration already defined $realurl[$host]['fileName']? 
> You erase it.
> 

Aha! Now I see why I was getting the error in the first place... My 
realurl_conf.php file is missing a 'fileName' => array() declaration.

Thanks for waking me up to that, Dmitry! :D