From 24e485039dd9afb91d9f41cbcea5b351902d0727 Mon Sep 17 00:00:00 2001
From: David Wells <drwells@email.unc.edu>
Date: Sun, 16 Dec 2018 17:13:07 -0500
Subject: [PATCH] Pass by const reference instead of const value.

Caught by coverity.
---
 examples/step-28/step-28.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/examples/step-28/step-28.cc b/examples/step-28/step-28.cc
index a7e4d6b35d..f0e6b763e3 100644
--- a/examples/step-28/step-28.cc
+++ b/examples/step-28/step-28.cc
@@ -517,7 +517,7 @@ namespace Step28
       const EnergyGroup<dim> &                       g_prime,
       const typename DoFHandler<dim>::cell_iterator &cell_g,
       const typename DoFHandler<dim>::cell_iterator &cell_g_prime,
-      const FullMatrix<double>                       prolongation_matrix);
+      const FullMatrix<double> &                     prolongation_matrix);
   };
 
 
@@ -849,7 +849,7 @@ namespace Step28
     const EnergyGroup<dim> &                       g_prime,
     const typename DoFHandler<dim>::cell_iterator &cell_g,
     const typename DoFHandler<dim>::cell_iterator &cell_g_prime,
-    const FullMatrix<double>                       prolongation_matrix)
+    const FullMatrix<double> &                     prolongation_matrix)
   {
     // The first case is that both cells are no further refined. In that case,
     // we can assemble the relevant terms (see the introduction). This
-- 
2.39.5