Description:
------------
I am using the sablotron xsl extension to transform xml files.  The xsl:copy-of tag does not appear to work properly.  It should copy the tree fragment entirely to the result document but it only copies element tags.  Some of the elements contain text within them (ie: <test>some text</test> would copy as <test></test> without the text).  I am convinced that my code is fine because other transforms that don't use this tag work fine and there are somre pretty crazy transforms that I am trying to run.

Reproduce code:
---------------
My XML data:
<?xml version="1.0"?>
<testroot>
	<testelement>
		<anotherelement>
			some text
		</anotherelement>
		<and_again>
			some more text
		</and_again>
	</testelement>
</testroot>

My XSL sheet:
<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
	<xsl:template match="testelement">
		<xsl:copy-of select="."/>
	</xsl:template>
</xsl:stylesheet>

My PHP Code:
$xslp = xslt_create();
echo xslt_process($xslp, 'in.xml', 'xsl.xsl');
xslt_free($xslp);


Expected result:
----------------
<testelement>
  <anotherelement>
    some text
  </anotherelement>
  <and_again>
    some more text
  </and_again>
</testelement>


Actual result:
--------------
<?xml version="1.0" encoding="UTF-8" ?> 
<testelement>
  <anotherelement /> 
  <and_again /> 
</testelement>