votingapi_get_voting_result() param $value_type is string, not int

Error in function documentation:

/**
 * A simple helper function that returns a single cached voting result.
 *
 * @param $content_type
 *   A string identifying the type of content whose votes are being retrieved. Node, comment, aggregator item, etc.
 * @param $content_id
 *   The key ID of the content whose votes are being retrieved.
 * @param $value_type
 *   An optional int representing the type of value saved in the vote. Three standard types are defined by votingapi:

Change 'optional int' to 'optional string' surely?