* python/libstdcxx/v6/printers.py (StdMapPrinter.__init__): Don't
	set self.iter.
	(StdMapPrinter.to_string): Make a new iterator.
	(StdMapPrinter.children): Likewise.
	(StdSetPrinter.__init__): Don't set self.iter.
	(StdSetPrinter.to_string): Make a new iterator.
	(StdSetPrinter.children): Likewise.

From-SVN: r148506