From d2349066afb3ace5eca355a2e596cd3773fe63ba Mon Sep 17 00:00:00 2001
From: Mael <mael.rouxel.labbe@geometryfactory.com>
Date: Thu, 22 Aug 2019 09:03:01 +0200
Subject: [PATCH] Add const marker

Co-Authored-By: Sebastien Loriot <sloriot.ml@gmail.com>
---
 .../include/CGAL/Polygon_mesh_processing/stitch_borders.h       | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/stitch_borders.h b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/stitch_borders.h
index 65f76299f05..cd511f16913 100644
--- a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/stitch_borders.h
+++ b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/stitch_borders.h
@@ -566,7 +566,7 @@ std::size_t stitch_boundary_cycle(const typename boost::graph_traits<PolygonMesh
   // not everything is always stitchable
   std::set<halfedge_descriptor> unstitchable_halfedges;
 
-  halfedge_descriptor null_h = boost::graph_traits<PolygonMesh>::null_halfedge();
+  const halfedge_descriptor null_h = boost::graph_traits<PolygonMesh>::null_halfedge();
   halfedge_descriptor bh = h;
   for(;;) // until there is nothing to stitch anymore
   {