triangulation-type setting for non-triangulated polyhedral from iterator

src/ifcwrap/IfcGeomWrapper.i

@@ -681,7 +681,17 @@ struct ShapeRTTI : public boost::static_visitor<PyObject*>
 
     %pythoncode %{
         # Hide the getters with read-only property implementations
-        faces = property(faces)
+        faces_tri = property(faces)
+        polyhedral_faces_without_holes = property(polyhedral_faces_without_holes)
+        polyhedral_faces_with_holes = property(polyhedral_faces_with_holes)
+        def get_faces(self):
+            if self.faces_tri: 
+                return self.faces_tri
+            elif self.polyhedral_faces_without_holes:
+                return self.polyhedral_faces_without_holes
+            else:
+                return self.polyhedral_faces_with_holes
+        faces = property(get_faces)
         edges = property(edges)
         material_ids = property(material_ids)
         materials = property(materials)