Fix some mapping errors

src/ifcgeom/mapping/IfcIndexedPolyCurve.cpp

@@ -44,10 +44,7 @@ taxonomy::item* mapping::map_impl(const IfcSchema::IfcIndexedPolyCurve* inst) {
 
 	int max_index = (int) points.size();
 
-	taxonomy::loop* loop;
-
-	// ignored, just for capturing the curve parameters on the null check
-	double u, v;
+	auto loop = new taxonomy::loop;
 
 	if(inst->Segments()) {
 		aggregate_of_instance::ptr segments = *inst->Segments();

src/ifcgeom/mapping/IfcPolygonalFaceSet.cpp

@@ -61,6 +61,10 @@ taxonomy::item* mapping::map_impl(const IfcSchema::IfcPolygonalFaceSet* inst) {
 				}
 				previous = current;
 			}
+			if (!indices.empty()) {
+				const taxonomy::point3& current = points[indices.front() - 1];
+				loop->children.push_back(new taxonomy::edge(previous, current));
+			}
 		}
 
 		if (f->as<IfcSchema::IfcIndexedPolygonalFaceWithVoids>()) {
@@ -82,6 +86,10 @@ taxonomy::item* mapping::map_impl(const IfcSchema::IfcPolygonalFaceSet* inst) {
 					}
 					previous = current;
 				}
+				if (!indices.empty()) {
+					const taxonomy::point3& current = points[indices.front() - 1];
+					loop->children.push_back(new taxonomy::edge(previous, current));
+				}
 			}
 		}
 	}

src/ifcgeom/mapping/IfcTriangulatedFaceSet.cpp

@@ -62,6 +62,8 @@ taxonomy::item* mapping::map_impl(const IfcSchema::IfcTriangulatedFaceSet* inst)
 			}
 		}
 	}
+
+	return shell;
 }
 
 #endif