* mln/morpho/closing/area.hh: update copyright.

	* mln/morpho/closing/leveling.hh: fix guard and revamp.

	* mln/morpho/rank_filter.hh: update forward declaration.

	* tests/morpho/Makefile.am: run tests in morpho/closing and
	morpho/opening.

	* tests/morpho/closing/area.cc,
	* tests/morpho/closing/height.cc,
	* tests/morpho/closing/sum.cc,
	* tests/morpho/closing/volume.cc,
	* tests/morpho/opening/area.cc,
	* tests/morpho/opening/height.cc,
	* tests/morpho/opening/sum.cc,
	* tests/morpho/opening/volume.cc: use tiny.ppm instead of lena.ppm, it
	is faster.

git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@3469 4aad255d-cdde-0310-9447-f3009e2ae8c0