Increase error quadrature.

git-svn-id: https://svn.dealii.org/trunk@5189 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/examples/step-12/step-12.cc b/deal.II/examples/step-12/step-12.cc
index 65d6f8cba7f1df8fe27c1216ffcd84488a480273..741eb6c9ab6f958059fbb10f6973f14c38ca6c13 100644 (file)
--- a/deal.II/examples/step-12/step-12.cc
+++ b/deal.II/examples/step-12/step-12.cc
@@ -308,8 +308,8 @@ template <int dim>
 void TransportProblem<dim>::assemble_system () 
 {
                                   // See Cockburn paper for the proper quadrature.
-  QGauss2<dim>  quadrature;
-  QGauss2<dim-1>  face_quadrature;
+  QGauss4<dim>  quadrature;
+  QGauss4<dim-1>  face_quadrature;
   
   const unsigned int dofs_per_cell = dof_handler.get_fe().dofs_per_cell;
   vector<unsigned int> dofs (dofs_per_cell);