Fix bugs caught by static analysis

Aleksander Machniak

2013-05-06 c027ba7709a86c23038428de15ffed503e67c522

 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];
            }
        }