Fixed #651 by setting session.save_handler explicitly.

git-svn-id: http://dev.piwik.org/svn/trunk@1070 59fd770c-687e-43c8-a1e3-f5a4ff64c105

index.php

@@ -12,6 +12,7 @@
 error_reporting(E_ALL|E_NOTICE);
 @ini_set('display_errors', 1);
 @ini_set('magic_quotes_runtime', 0);
+@ini_set('session.save_handler', 'files');
 if(!defined('PIWIK_INCLUDE_PATH'))
 {
 	define('PIWIK_INCLUDE_PATH', dirname(__FILE__));