step-12: use add_data_vector with DoFHandler

Otherwise data output breaks if you switch to DG(0) (cell vs dof
dataout).

diff --git a/examples/step-12/step-12.cc b/examples/step-12/step-12.cc
index 1a4ff62df84c9a11d1d1f5f69e2d04e0fbe94907..635729254a54bc2df5167e8d975e7a5bcadb352a 100644 (file)
--- a/examples/step-12/step-12.cc
+++ b/examples/step-12/step-12.cc
@@ -549,7 +549,7 @@ namespace Step12
 
     DataOut<dim> data_out;
     data_out.attach_dof_handler(dof_handler);
-    data_out.add_data_vector(solution, "u");
+    data_out.add_data_vector(solution, "u", DataOut<dim>::type_dof_data);
 
     data_out.build_patches();