Bugfix: Revert an accidential change of an unrelated function

diff --git a/include/deal.II/multigrid/mg_coarse.h b/include/deal.II/multigrid/mg_coarse.h
index ab62a4aca28bca729b636ba1dfdb8df31a8e6079..04b28f05f20818b9ca5d8116d2ac3a371f8d10de 100644 (file)
--- a/include/deal.II/multigrid/mg_coarse.h
+++ b/include/deal.II/multigrid/mg_coarse.h
@@ -515,7 +515,9 @@ MGCoarseGridIterativeSolver<VectorType, SolverType, MatrixType, PreconditionerTy
               const VectorType   &src) const
 {
   Assert(solver!=nullptr, ExcNotInitialized());
-  solver->solve(matrix, dst, src, preconditioner);
+  Assert(matrix!=nullptr, ExcNotInitialized());
+  Assert(preconditioner!=nullptr, ExcNotInitialized());
+  solver->solve(*matrix, dst, src, *preconditioner);
 }