[SALOME platform 0019316]: Need to have a better interface with GHS3D diagnostics

[SALOME platform 0019316]: Need to have a better interface with GHS3D diagnostics
   struct ComputeError
   {
+    boolean hasBadMesh; // there are elements preventing computation available for visualization
   }

+  SMESH::MeshPreviewStruct* GetBadInputElements( SMESH::SMESH_Mesh_ptr theMesh,
+                                                 CORBA::Short          theSubShapeID )