$suffix = isset( $options['suffix'] ) ? $options['suffix'] : '';
$prefix = isset( $options['prefix'] ) ? $options['prefix'] : '';
$key = isset( $options['key'] ) ? intval( $options['key'] ) : 0;
-$dbw =& wfGetDB( DB_MASTER );
+$dbw = wfGetDB( DB_MASTER );
$duper = new NamespaceConflictChecker( $dbw );
if( $prefix ) {