[RCU] SQLite with git clone

Hi, I was under the impression that Roundcube now uses SQLite3 via the PDO driver but I can't seem to get it to work.

Debian 6 stable with PHP 5.3.3, Roundcube is recent git clone and the database was created with...

cat SQL/sqlite.initial.sql | sqlite3 roundcube.db

the permissions are okay but when I get to installer/index.php?_step=3 I get...

main.inc.php: OK db.inc.php: OK temp/: OK logs/: OK DSN (write): OK Fatal error: Call to undefined method rcube_db_sqlite::_get_result() in /path/to/webmail/program/lib/Roundcube/rcube_db_sqlite.php on line 123