[jdom-interest] Bug in Element.clone()

[Dan Sojka]

The clone() method of Element throws a null pointer exception if the
Element doesn't contain a Namespace (and additionalNamespaces is null).
The bug was found in the latest daily snapshot retrieved on 12/18/00 and
is in Element.clone() on line 1494.  A null check should probably be
added.

Change :
...
 // Handle additional namespaces
element.additionalNamespaces =
  (LinkedList) additionalNamespaces.clone();
...

To :
...
 // Handle additional namespaces
 if (additionalNamespaces != null) {
     element.additionalNamespaces =
  (LinkedList) additionalNamespaces.clone();
 }
...