Wikimedia Bugzilla is closed!

Hello!
I installed the Wikimedia-Wiki two days ago on my Server. Everything works fine
except the search-function. I get the following error:
Fatal error: Only variables can be passed by reference in
/srv/www/vhosts/kernelwiki.ath.cx/wiki/includes/SearchEngine.php on line 37

I tried to fix SearchEngine.php by changing the lines
function searchTitle( $term ) {
		return $this->db->resultObject( $this->db->query( $this->getQuery(
$this->filter( $term ), false ) ));
	}

to 

function searchTitle( $term ) {
		$tmp = $this->db->query( $this->getQuery( $this->filter( $term ), false ) );
		return $this->db->resultObject( $tmp );
	}

but that causes a lot of errors. I searched the web for the error message and I
learned that this is a PHP 5 problem. On my local computer at home it works fine
with PHP 5.0.4. But on the Server I use php 5.1.0 and it doesn't work.

Regards,
     Andi Drebes