[XML-SIG] Trivial DOM patch

[Lars Marius Garshol]

This patch fixes a trivial buglet in the DOM example in xml.dom.core:

[larsga@birk105 dom]$ cvs diff core.py
Index: core.py
===================================================================
RCS file: /projects/cvsroot/xml/dom/core.py,v
retrieving revision 1.33
diff -r1.33 core.py
30c30,31
< doc.appendChild (head)                  # and this
---
> html.appendChild(head)                  # and this
> doc.appendChild (html)                  # and this

--Lars M.