reduce warning level in tnt::Savepoint
reduce warning level in tnt::Savepoint

OlafRadicke/tntnet,maekitalo/tntnet,maekitalo/tntnet,maekitalo/tntnet,maekitalo/tntnet,OlafRadicke/tntnet,OlafRadicke/tntnet,maekitalo/tntnet,maekitalo/tntnet,OlafRadicke/tntnet,OlafRadicke/tntnet