fix PETSc step-70 compilation

candidate for 9.2

diff --git a/examples/step-70/step-70.cc b/examples/step-70/step-70.cc
index 7ab7f5faff639dd8c16da9a9b509350f2bb4ee0a..107a815e70f65a46be1c619389250d2fed5ec25c 100644 (file)
--- a/examples/step-70/step-70.cc
+++ b/examples/step-70/step-70.cc
@@ -1603,8 +1603,7 @@ namespace Step70
 
     const auto P = block_diagonal_operator<2, LA::MPI::BlockVector>(
       std::array<
-        dealii::LinearOperator<
-          typename dealii::TrilinosWrappers::MPI::BlockVector::BlockType>,
+        dealii::LinearOperator<typename LA::MPI::BlockVector::BlockType>,
         2>{{amgA, amgS}});
 
     SolverControl solver_control(system_matrix.m(),