Simply include header, rather than using forward declaration. Fixes respective

failure on hp-branch.

git-svn-id: https://svn.dealii.org/trunk@9127 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/tests/deal.II/wave-test-3.cc b/tests/deal.II/wave-test-3.cc
index 3d5e8d58673638ec30139fc7750778fb5d57f5fd..f64dd7910ecfac6879f7c0817e59a387644c51e5 100644 (file)
--- a/tests/deal.II/wave-test-3.cc
+++ b/tests/deal.II/wave-test-3.cc
@@ -857,9 +857,7 @@ virtual double evaluate ();
     double integrated_value, weighted_value;
 };
 
-
-template <int dim> class DataOutStack;
-
+#include <numerics/data_out_stack.h>
 
 /**
  * This class has some data members which are shared between the different
@@ -1646,7 +1644,6 @@ class WaveParameters
 
 
 template <int dim> class WaveParameters;
-template <int dim> class DataOutStack;
 class SweepInfo;