$db->sql_fetchfield returns false with mssqlnative

hi,

I'm debugging a mod in mssql and have trouble with sql_fetchfield in mssql. it returns false every time. However the query is ok when i run it in a session.

$db->sql_fetchfield calls sql_rowseek and then the result_mssqlnative class is initialised. Thereby it calls sqlsrv_fetch_array a first time and loops the row once.

After that it passes through the sql_fetchrow function in mssqlnative.php and calls sqlsrv_fetch_array a second time. this time the $row is empty because there is no next row to be fetched.

$db->sql_fetchfield then returns false to the caller.

So i think there's a bug in this class.