/*
 * call-seq:
 *  next_element
 *
 * Returns the next Nokogiri::XML::Element type sibling node.
 */
static VALUE next_element(VALUE self)
{
  xmlNodePtr node, sibling;
  Data_Get_Struct(self, xmlNode, node);

  sibling = xmlNextElementSibling(node);
  if(!sibling) return Qnil;

  return Nokogiri_wrap_xml_node(Qnil, sibling);
}