Minimal changes for XSLT node-set() extra function:

- tree.c: minor doc fix
- xpath.c: deallocation issues when a result tree has been
  converted to a node-set
Daniel

tree.c

@@ -3658,7 +3658,7 @@ xmlGetNsList(xmlDocPtr doc, xmlNodePtr node) {
  * xmlSearchNs:
  * @doc:  the document
  * @node:  the current node
- * @nameSpace:  the namespace string
+ * @nameSpace:  the namespace prefix
  *
  * Search a Ns registered under a given name space for a document.
  * recurse on the parents until it finds the defined namespace