Fix bugs caught by static analysis

Aleksander Machniak

2013-05-06 78c270c9f259c33b703cfb26b96b8dbb062db21e

 program/lib/Roundcube/rcube_db_mysql.php

@@ -147,7 +147,7 @@

            $result = $this->query('SHOW VARIABLES');

            while ($sql_arr = $this->fetch_array($result)) {
            while ($row = $this->fetch_array($result)) {
                $this->variables[$row[0]] = $row[1];
            }
        }