Remove use of MPI_COMM_WORLD in serial Trilinos vector.

diff --git a/include/deal.II/lac/constraint_matrix.templates.h b/include/deal.II/lac/constraint_matrix.templates.h
index 4c732d2e2fabd30bec6f7671d2565c2d9e17eb18..4428968c05d8185cc71eb6d02305a90e134069a9 100644 (file)
--- a/include/deal.II/lac/constraint_matrix.templates.h
+++ b/include/deal.II/lac/constraint_matrix.templates.h
@@ -769,7 +769,7 @@ namespace internal
       Assert (mpi_comm != nullptr, ExcInternalError());
       output.reinit (needed_elements, mpi_comm->GetMpiComm());
 #else
-      output.reinit (needed_elements, MPI_COMM_WORLD);
+      output.reinit (needed_elements, MPI_COMM_SELF);
 #endif
       output = vec;
     }