[xml] patch: namespace corruption in xmlParseBalancedChunkMemoryRecover

[Rob Richards <rrichards ctindustries net>]

Can someone commit this patch for me? I am away and can't commit to CVS 
right now.

Patch fixes tree corruption when a doc is passed to 
xmlParseBalancedChunkMemoryRecover and something using the XML namespace 
is parsed from the chunk. This patch makes sure that the XML namespapce 
has already been created on the origional document and sets oldNS from 
the origional document on newDoc. This way the XML namespace from the 
origional document will be used on the tree being created, so when tree 
is added to origional document and newDoc is destroyed the namespace 
will be valid.
Currently once newDoc is free'd (causing the XML namespace created just 
for that document to be freed), its use in the new tree is now garbage.

rans the tests and they were fine.

Rob

Index: parser.c
===================================================================
RCS file: /cvs/gnome/libxml2/parser.c,v
retrieving revision 1.453
diff -c -r1.453 parser.c
*** parser.c    13 Jul 2006 06:29:52 -0000      1.453
--- parser.c    11 Sep 2006 18:56:23 -0000
***************
*** 11903,11908 ****
--- 11903,11911 ----
      } else {
        ctxt->myDoc = newDoc;
        newDoc->children->doc = doc;
+       /* Ensure that doc has XML spec namespace */
+       xmlSearchNsByHref(doc, (xmlNodePtr)doc, XML_XML_NAMESPACE);
+       newDoc->oldNs = doc->oldNs;
      }
      ctxt->instate = XML_PARSER_CONTENT;
      ctxt->depth = depth;
***************
*** 11963,11968 ****
--- 11966,11972 ----
      xmlFreeParserCtxt(ctxt);
      newDoc->intSubset = NULL;
      newDoc->extSubset = NULL;
+       newDoc->oldNs = NULL;
      xmlFreeDoc(newDoc);
      
      return(ret);