error on searching: $matches should be $keys

I get an error on doing advanced search.

In the current distribution version, on line 326 you have this

preg_match_all('|\b' . $key . '\b|', $results[$id]['body'], $matches);

I believe it should look like this

preg_match_all('|\b' . $key . '\b|', $results[$id]['body'], $keys);