Feature 511 : add support for sqlite database engine

Using session_write_close function when session handler use database because write is called after object destruction.

git-svn-id: http://piwigo.org/svn/trunk@4781 68402e56-0260-453c-a942-63ccdbb3a9ee

include/functions_session.inc.php

@@ -70,6 +70,7 @@ if (isset($conf['session_save_handler'])
   }
   session_name($conf['session_name']);
   session_set_cookie_params(0, cookie_path());
+  register_shutdown_function('session_write_close');
 }
 
 /**