No static in _radioactivity_node_resolve_node_type()

Looking at the code, and in _radioactivity_node_resolve_node_type() there is an allowance for caching statically the node type, but there is no static declaration.

function _radioactivity_node_resolve_node_type($nid, $oclass) {
  if (!isset($cached_types[$nid])) {
    $type = db_result(db_query("SELECT type FROM {node} WHERE nid = %d", $nid));
    $cached_types[$nid]=$type;
  }

  return $cached_types[$nid];
}

the function should be

function _radioactivity_node_resolve_node_type($nid, $oclass) {
  static $cached_types = array();

  if (!isset($cached_types[$nid])) {
    $type = db_result(db_query("SELECT type FROM {node} WHERE nid = %d", $nid));
    $cached_types[$nid]=$type;
  }

  return $cached_types[$nid];
}

or the check needs to be removed.