[Plugin: AZIndex] Sort by 2nd letter of a word

Currently AZindex sorts the index well, unless the 2nd caracter of a word has a non-alpha char, like an accent, example it does :

Aaaa
Abbb
Aeeee
Affff
Aggg
Aààààà
Aééééé

The words with accents go at the end of the list. You expect the accents the be removed before sorting.

My hack :

// line 1606 of file az-index-cache.php
$sorthead = Unaccent($sorthead);

Put this function in functions.php :

function Unaccent($string)
{
    return preg_replace('~&([a-z]{1,2})(acute|cedil|circ|grave|lig|orn|ring|slash|th|tilde|uml);~i', '$1', htmlentities($string, ENT_QUOTES, 'UTF-8'));
}

Then, the sorting is fine :

Aaaa
Aààààà
Abbb
Aeeee
Aééééé
Affff
Aggg

http://wordpress.org/extend/plugins/azindex/