wrappers python: old numpy compatibility

git-svn-id: https://geuz.org/svn/gmsh/trunk@19506 59c8cabf-10d6-4a28-b43f-3936b85956c4
Circle Concentric DDM test case from getdp ddm_wave_simple

git-svn-id: https://geuz.org/svn/gmsh/trunk@19507 59c8cabf-10d6-4a28-b43f-3936b85956c4
git-svn-id: https://geuz.org/svn/gmsh/trunk@19508 59c8cabf-10d6-4a28-b43f-3936b85956c4