Bug in XInclude transformer?

[Joachim Breitsprecher]

Hi all,
I think I found a bug in Cocoon's XInclude transformer. Try this pipeline:
<map:match pattern="test">
  <map:generate src="test.xml" />
  <map:transform type="xinclude" />
  <map:serialize type="xml" />
</map:match>
whith test.xml containing:
<?xml version="1.0" encoding="utf-8" ?>
<root xmlns:xi="http://www.w3.org/2001/XInclude";>
  <xi:include href="this_file_does_not_exist.xml">
    <xi:fallback>
      <element>This should be here if the file was not found</element>
    </xi:fallback>
  </xi:include>
</root>
With all cocoon versions I tested (2.1.4, 2.1.5.1, 2.1.6, SVN head) this 
pipeline gives me an unbalanced output if this_file_does_not_exist.xml 
doesn't exist.

I have prepared a patch against the current SVN version and am ready to 
file a bug if no-one objects :-)

Regards,
Joachim