add a missing compress in multigrid

git-svn-id: https://svn.dealii.org/trunk@29608 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/include/deal.II/multigrid/mg_transfer.templates.h b/deal.II/include/deal.II/multigrid/mg_transfer.templates.h
index eac5bb03d76df363b9400f6e0b531dbca63f834d..a854e92e76269e229eda3593ac51e765f3a81020 100644 (file)
--- a/deal.II/include/deal.II/multigrid/mg_transfer.templates.h
+++ b/deal.II/include/deal.II/multigrid/mg_transfer.templates.h
@@ -161,6 +161,8 @@ MGTransferPrebuilt<VECTOR>::copy_to_mg (
            i != copy_indices[level].end(); ++i)
         dst_level(i->second) = src(i->first);
 
+      dst_level.compress(VectorOperation::insert);
+
       // For non-DG: degrees of
       // freedom in the refinement
       // face may need special