Fixed bug impacting only unit testing procedures

git-svn-id: http://svn.code.sf.net/p/itop/code/trunk@208 a333f486-631f-4898-b8df-5754b55c2be0

addons/userrights/userrightsnull.class.inc.php

@@ -74,7 +74,7 @@ class UserRightsNull extends UserRightsAddOnAPI
 		return UR_ALLOWED_YES;
 	}
 
-	public static function FlushPrivileges()
+	public function FlushPrivileges()
 	{
 	}
 }