Description:
------------
Unable to assign node-set to xslt variable.  

<xsl:variable name="test">
  <root>
    <node>one</node>
    <node>two</node>
  </root>
</xsl:variable>

<xsl:for-each select="$test/*">
  ...
</xsl:for-each>

The variable should contain a node-set; instead it contains just a string.  This throws an "Invalid type" error (see below) when trying to iterate the (sub)nodes using for-each.

Reproduce code:
---------------
environment:  
http://www.tenandtwo.com/test_xsl/info.php

run:
http://www.tenandtwo.com/test_xsl/bug.php

source:
http://www.tenandtwo.com/test_xsl/show_source.php?file=/test_xsl/bug.php
http://www.tenandtwo.com/test_xsl/show_source.php?file=/test_xsl/bug.xsl

Expected result:
----------------
TEST: 
****

xsl:value-of select="$test": 
onetwo

xsl:copy-of select="$test": 
<RESULT>
  <node>one</node>
  <node>two</node>
</RESULT>

xsl:for-each select="$test/*": 
name=RESULT; value=
name2=node; value2=one
name2=node; value2=two
****

DONE


Actual result:
--------------
Warning: XSLTProcessor::transformToXml() [function.transformToXml]: Invalid type in /var/www/vhosts/tenandtwo.com/httpdocs/test_xsl/bug.php on line 39

TEST: 
****

xsl:value-of select="$test": 
onetwo

xsl:copy-of select="$test": 
<RESULT><node>one</node><node>two</node></RESULT>

xsl:for-each select="$test/*":