Fixed part of firebird tests with native driver

index.php

@@ -100,7 +100,7 @@ foreach(pdo_drivers() as $d)
 }
 
 // Load Firebird if there is support
-if(function_exists('ibase_connect'))
+if(function_exists('ibase_connect') && ! in_array('firebird', pdo_drivers()))
 {
 	require_once("{$path}firebird-ibase.php");
 	require_once("{$path}firebird_sql.php");

sys/databases/firebird.php

@@ -19,9 +19,12 @@ class Firebird extends DB_PDO {
 	/**
 	 * Constructor
 	 */
-	public function __construct($dbpath, $user, $pass)
+	public function __construct($dbpath, $user='sysdba', $pass='masterkey')
 	{
 		parent::__construct("firebird:{$dbpath}", $user, $pass);
+
+		$class = __CLASS__."_sql";
+		$this->sql = new $class;
 	}
 
 	// --------------------------------------------------------------------------

tests/index.php

@@ -15,7 +15,6 @@
 /**
  * Unit test bootstrap - Using php simpletest
  */
-
 define('BASE_DIR', '../src');
 
 // Include simpletest