Patch to avoid error message: MySQL error 1052: Column 'relation_type' in on clause is ambiguous

(Version 4.0.1d)


data/Link.php:473

OLD:

Code:
$subjoin.=" AND ".$this->_relationship->relationship_role_column;
NEW:
Code:
$subjoin.=" AND ".$this->_relationship->join_table . "." .$this->_relationship->relationship_role_column;