From 8b08be2b78b937aa98e6cb74675499f3a8759379 Mon Sep 17 00:00:00 2001
From: Robert Kloefkorn <robert.kloefkorn@iris.no>
Date: Thu, 18 Feb 2016 15:31:35 +0100
Subject: [PATCH] fastSparseAdd/Substruct: use operator += and -=.

---
 opm/autodiff/fastSparseOperations.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/opm/autodiff/fastSparseOperations.hpp b/opm/autodiff/fastSparseOperations.hpp
index b5747215a..84346aa8b 100644
--- a/opm/autodiff/fastSparseOperations.hpp
+++ b/opm/autodiff/fastSparseOperations.hpp
@@ -245,7 +245,7 @@ fastSparseAdd(Lhs& lhs, const Rhs& rhs)
     else
     {
         // default Eigen operator+=
-        lhs = lhs + rhs;
+        lhs += rhs;
     }
 }
 
@@ -274,7 +274,7 @@ fastSparseSubstract(Lhs& lhs, const Rhs& rhs)
     else
     {
         // default Eigen operator-=
-        lhs = lhs - rhs;
+        lhs -= rhs;
     }
 }