ExtDnd - generating errors when clicking/dragging outside of the area covered by the draggable items

[Arantor]

Two errors occur in ExtDnd if you have a container that is larger than the space required by the items in the list (in my case, I have two fancytrees in jQuery UI Tabs and have a fixed height, so I have space below the tree)

Firstly:

                    var node = $.ui.fancytree.getNode(event);
                    node.debug("Re-enable focus that was prevented by jQuery UI draggable.");

throws an error due to undefined property debug. This looks like it was fixed in 8480fa9 but for some reason doesn't seem to show up in -all or -all.min in the master repo.

Secondly:

            helper: function(event) {
                var $helper,
                    sourceNode = $.ui.fancytree.getNode(event.target),
                    $nodeTag = $(sourceNode.span);

The .span property is also undefined and throws an error every movement of the mouse while the mouse button is held down. Since the event isn't on a node, there's no span for it to target. I'm not sure of the innards enough to come up with a fix yet though.

[mar10]

Thanks. (The first fix #402 is not yet released.)