From: Timo Heister <timo.heister@gmail.com>
Date: Fri, 2 Sep 2022 14:13:18 +0000 (-0400)
Subject: fix: step-50 PETSc
X-Git-Tag: v9.5.0-rc1~998^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F14235%2Fhead;p=dealii.git

fix: step-50 PETSc

add a missing include
---

diff --git a/examples/step-50/step-50.cc b/examples/step-50/step-50.cc
index c315c2dad5..f07a70f08d 100644
--- a/examples/step-50/step-50.cc
+++ b/examples/step-50/step-50.cc
@@ -43,6 +43,7 @@
 #include <deal.II/grid/tria.h>
 #include <deal.II/lac/affine_constraints.h>
 #include <deal.II/lac/dynamic_sparsity_pattern.h>
+#include <deal.II/lac/sparsity_tools.h>
 #include <deal.II/lac/solver_cg.h>
 
 // We use the same strategy as in step-40 to switch between PETSc and