prevent index out of bound in case of a single point

hlg · aothms · commit df49f1bc1bfa · 2019-02-15T14:22:02.000+01:00
diff --git a/src/ifcgeom/IfcGeomWires.cpp b/src/ifcgeom/IfcGeomWires.cpp
@@ -912,7 +912,7 @@ bool IfcGeom::Kernel::convert(const IfcSchema::IfcIndexedPolyCurve* l, TopoDS_Wi
 				throw IfcParse::IfcException("Unexpected IfcIndexedPolyCurve segment of type " + IfcSchema::Type::ToString(segment->type()));
 			}
 		}
-	} else {
+	} else if (points.begin() < points.end()) {
                 std::vector<gp_Pnt>::const_iterator previous = points.begin();
                 for (std::vector<gp_Pnt>::const_iterator current = previous+1; current < points.end(); ++current){
                         w.Add(BRepBuilderAPI_MakeEdge(*previous, *current));

Original file line number	Diff line number	Diff line change
`@@ -912,7 +912,7 @@ bool IfcGeom::Kernel::convert(const IfcSchema::IfcIndexedPolyCurve* l, TopoDS_Wi`
`912`	`912`	`throw IfcParse::IfcException("Unexpected IfcIndexedPolyCurve segment of type " + IfcSchema::Type::ToString(segment->type()));`
`913`	`913`	`}`
`914`	`914`	`}`
`915`		`- } else {`
	`915`	`+ } else if (points.begin() < points.end()) {`
`916`	`916`	`std::vector<gp_Pnt>::const_iterator previous = points.begin();`
`917`	`917`	`for (std::vector<gp_Pnt>::const_iterator current = previous+1; current < points.end(); ++current){`
`918`	`918`	`w.Add(BRepBuilderAPI_MakeEdge(previous, current));`