Description:
------------
PDO_Firebird omits first row from query.

Reproduce code:
---------------
First create sample table:
CREATE TABLE PDO_BUG(
  ID Integer NOT NULL,
  TEXTFIELD Varchar(20),
  NUMFIELD Numeric(18,2),
  PRIMARY KEY (ID)
);
INSERT INTO PDO_BUG (ID, TEXTFIELD, NUMFIELD) VALUES ('1', 'val1', '992831.00');
INSERT INTO PDO_BUG (ID, TEXTFIELD, NUMFIELD) VALUES ('2', 'val2', '488111.00');
INSERT INTO PDO_BUG (ID, TEXTFIELD, NUMFIELD) VALUES ('3', 'val3', '1109911.00');

 $dbh = new PDO('firebird:dbname=localhost:database','SYSDBA','masterkey');
 $sql = "select * from PDO_BUG order by ID" ;
 $stm = $dbh->prepare($sql);
 $stm->execute();
 $result = $stm->fetchAll(PDO::FETCH_ASSOC);
 print_r($result);

Expected result:
----------------
$result should containt 3 rows from query.

Actual result:
--------------
First row is omitted. I already tried different methods (with or without prepare, fetching single rows etc.). I didn't find a way to make PDO return all rows from query including first one.