/*
 * call-seq:
 *   attribute(name)
 *
 * Get the attribute node with +name+
 */
static VALUE attr(VALUE self, VALUE name)
{
  xmlNodePtr node;
  xmlAttrPtr prop;
  Data_Get_Struct(self, xmlNode, node);
  prop = xmlHasProp(node, (xmlChar *)StringValuePtr(name));

  if(! prop) return Qnil;
  return Nokogiri_wrap_xml_node((xmlNodePtr)prop);
}