Description:
------------
The problem occurs when Firebird 3.0 is used.

Using the "pdo_firebird" extension, the problem occurs.

If you use the "Interbase" extension is run normally.

Test script:
---------------
<?php
$pdo = new PDO('firebird:dbname=localhost:/tmp/TEST.FDB;charset=ISO8859_1', 'SYSDBA', 'masterkey', array(
    PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
    PDO::ATTR_CASE    => PDO::CASE_LOWER,
        ));

$stmt = $pdo->prepare("INSERT INTO animal (type) VALUES ('cat') RETURNING type");

$stmt->execute();

echo $stmt->fetchColumn();
?>

Expected result:
----------------
cat

Actual result:
--------------
SQLSTATE[HY000]: General error: -902 Dynamic SQL Error SQLDA error Wrong number of parameters (expected 1, got 0)