Session: Update clean function to work with the new data store.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@587 44740490-163a-0410-bde0-09ae8108e29a

lib/SimpleSAML/Session.php

@@ -428,8 +428,7 @@ class SimpleSAML_Session {
 		SimpleSAML_Logger::debug('Library - Session: Cleaning Session. Clean cache: ' . ($cleancache ? 'yes' : 'no') );
 	
 		if ($cleancache) {
-			$this->authnrequests = array();
-			$this->logoutrequest = null;
+			$this->dataStore = null;
 			$this->idp = null;
 		}