From: jodlbauer <jdschule@gmx.at>
Date: Wed, 19 Dec 2018 10:24:29 +0000 (+0100)
Subject: set to zero if not reinited
X-Git-Tag: v9.1.0-rc1~480^2~1
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a3deddc5d74f3d31d8f0ffcf6d050b6b3ab64779;p=dealii.git

set to zero if not reinited
---

diff --git a/include/deal.II/multigrid/mg_transfer_matrix_free.h b/include/deal.II/multigrid/mg_transfer_matrix_free.h
index d45ac926c5..2e17af047b 100644
--- a/include/deal.II/multigrid/mg_transfer_matrix_free.h
+++ b/include/deal.II/multigrid/mg_transfer_matrix_free.h
@@ -653,6 +653,8 @@ MGTransferBlockMatrixFree<dim, Number>::copy_to_mg(
               }
             dst[level].collect_sizes();
           }
+        else
+          dst[level] = 0;
       }
   }