[xml] Clearing nsDef after xmlDocCopyNode

[Bruce Cartland <bruce cartland pobox com>]

I'm using xmlDocCopyNode to "clone" a node from one document into another

In the source node 
* "ns" value is set to the namespace
* "nsDef" is NULL 

After xmlDocCopyNode: 

In the destination node (newnode)
* "ns" value is set to the namespace
* "nsDef" is set to the same as "ns"

The namespace is already set at the document root. So I just do

newnode->nsDef = NULL;

Is this valid? Seems hacky but I couldn't see an API method to clear the namespace from the node.

Thanks