[xml] Namespace of children node existing before xmlSetNS

[Leonardo Boiko <leoboiko conectiva com br>]

Hi.  If you call xmlSetNs on the root node, existing children are still 
  namespaceless (the "ns" field of struct xmlNode is NULL, while 
children created afterwards will have it pointing to the root's namespace).

Is there a way of fixing this trough the library (a recursive xmlSetNs 
or something), or do I need to do it myself?

Background: my application must parse XML documents which may be 
incorrectly missing the root's namespace declaration, and I want to fix 
that before using the xmlDoc elsewhere, since I'll be doing XPath queries.

--
Leonardo Boiko

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