From e48a468d0916b28e826a67fa9f878502ab120fe2 Mon Sep 17 00:00:00 2001
From: Markus Blatt <markus@dr-blatt.de>
Date: Fri, 3 Aug 2018 17:32:36 +0200
Subject: [PATCH] Return a copy for Geomerty::center()

This is mandated by the DUNE interface. It also makes a lot of sense
because now people do not need to think whether
const auto& center = entity.geometry().center();
might cause a dangling reference. It just wont as it is always a copy
and never a reference to a member.
---
 opm/grid/cpgrid/Geometry.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/opm/grid/cpgrid/Geometry.hpp b/opm/grid/cpgrid/Geometry.hpp
index 5280d7b07..79ab748b3 100644
--- a/opm/grid/cpgrid/Geometry.hpp
+++ b/opm/grid/cpgrid/Geometry.hpp
@@ -253,7 +253,7 @@ namespace Dune
             }
 
             /// Returns the centroid of the geometry.
-            const GlobalCoordinate& center() const
+            GlobalCoordinate center() const
             {
                 return pos_;
             }