0021893: EDF 2133 SMESH : Improvement of 3D extrusion algorithm

0021893: EDF 2133 SMESH : Improvement of 3D extrusion algorithm

+  bool NeedLowerHyps(int dim) const { return _neededLowerHyps[ dim ]; }

+  void addBadInputElements(const SMESHDS_SubMesh* sm,
+                           const bool             addNodes=false);

+  bool _neededLowerHyps[4];     // hyp dims needed by algo that !NeedDiscreteBoundary(). Df. FALSE