Prevent node to be child of its successor

As far as I can see this is supposed to ba handled by there is typo (I guess):

function _nodehierarchy_tree_data($result, $exclude = NULL, $allowed_types, $depth, $previous_element = array()) {
  $remnant = NULL;
  $tree = array();
  $enabled_tree = TRUE;
  $exclude = NULL;

After I removed $exclude = NULL; it works fine for me.

I created a new patch which is supposed to handle all the children of the excluded node.

removing a trailing white spaces