* mln/topo/is_simple_2d.hh
	(mln::topo::is_simple_2d_t<N>::nb_connectivity2d):
	(mln::topo::is_simple_2d_t<N>::nb_connectivity2d__):
	Use a more reliable method to identify the neighborhood.
	* mln/topo/is_simple_point2d.hh: Typo in comment.