Description:
------------
There is a problem, with 
<xsl:sort select="TITLE"  data-type="text" lang="pl"/>.
The nodes with Polish special character aren`t sorting correctly. They are placed at the end of list.
It seems, that fucntion DomXsltStylesheet->process doesn`t work good.



Reproduce code:
---------------
a piece of xsl file: filmy.xsl
...
<xsl:apply-templates>
   <xsl:sort select="TITLE"  data-type="text" lang="pl"/>
</xsl:apply-templates>
...
fragment of php script
...
$filename = "filmy.xsl";
$xmldoc = domxml_open_file("filmy.xml");
$xsldoc = domxml_xslt_stylesheet_file($filename);
$result =  $xsldoc->process($xmldoc);
...