Saxon XSLT and XQuery Processor

An identity transform to a DOMResult (without
supplying a root node) produces a tree that is
corrupt; the behavior of navigation functions on this
tree is undefined but in many cases it will appear to
be empty.

Present in Saxon 6.4.2 and all previous releases since
JAXP 1.1 was introduced.

Raised by Daniel Parker

Fixed in Saxon 6.4.3

Cause: startDocument() in TinyBuilder was being called
twice, resulting in the creation of a second root node.

Fix: detect the double call on startDocument() and
ensure that the second call does nothing.