Fix confusing intersect/filter methods naming/behaviour.

Aleksander Machniak

2014-01-24 3b1d410b4ede2fd54be23bb47da5950535df9b04

 program/lib/Roundcube/rcube_result_thread.php

@@ -453,7 +453,7 @@

        // when sorting search result it's good to make the index smaller
        if ($index->count() != $this->count_messages()) {
            $index->intersect($this->get());
            $index->filter($this->get());
        }

        $result  = array_fill_keys($index->get(), null);