Fix vulnerability in handling _session argument of utils/save-prefs (#1489382)

Aleksander Machniak

2013-10-17 197203727417a03d87053a47e5aa5175a76e3e0b

 program/include/rcube_imap_cache.php

@@ -1108,10 +1108,12 @@
    private function build_thread_data($data, &$depth, &$children, $level = 0)
    {
        foreach ((array)$data as $key => $val) {
            $children[$key] = !empty($val);
            $depth[$key] = $level;
            if (!empty($val))
            $empty          = empty($val) || !is_array($val);
            $children[$key] = !$empty;
            $depth[$key]    = $level;
            if (!$empty) {
                $this->build_thread_data($val, $depth, $children, $level + 1);
            }
        }
    }