[xml] best way copy of xmlXPathObjectPtr->node

[<oliverst online de>]

Hey!

I wanted to do a function you give a xmlDocPtr and an XPath expression,
that returns a xmlNodeSetPtr, so you don't have to create any
xmlXPathContextPtr. The problem is, that nodesetval is being free'd,
when I call xmlXPathFreeObject() and I haven't found a function in
libxml2 to copy a xmlNodeSetPtr. Is there a better way to get a copy
beside loop through all the nodes and put them in a new xmlNodeSetPtr
one-by-one?

TIA
Oliver