fix lastInsertId typehint in SqlSrv

lib/Doctrine/DBAL/Driver/SQLSrv/SQLSrvStatement.php

@@ -108,9 +108,9 @@ class SQLSrvStatement implements IteratorAggregate, Statement
     /**
      * @param resource                                       $conn
      * @param string                                         $sql
-     * @param integer|null $lastInsertId
+     * @param \Doctrine\DBAL\Driver\SQLSrv\LastInsertId|null $lastInsertId
      */
-    public function __construct($conn, $sql, $lastInsertId = null)
+    public function __construct($conn, $sql, LastInsertId $lastInsertId = null)
     {
         $this->conn = $conn;
         $this->sql = $sql;