Add some missing headers to grid_tools_topology.h.

diff --git a/include/deal.II/grid/grid_tools_topology.h b/include/deal.II/grid/grid_tools_topology.h
index 6075e074fa71dbcab5589a3a76938ef4c3344299..4c6adddc27d7d20d8cf92311f23d977d15f00816 100644 (file)
--- a/include/deal.II/grid/grid_tools_topology.h
+++ b/include/deal.II/grid/grid_tools_topology.h
@@ -27,7 +27,10 @@
 #include <deal.II/lac/dynamic_sparsity_pattern.h>
 
 #include <list>
+#include <map>
+#include <set>
 #include <tuple>
+#include <utility>
 #include <vector>
 
 DEAL_II_NAMESPACE_OPEN