add missing forward declaration

git-svn-id: https://svn.dealii.org/trunk@29852 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/include/deal.II/meshworker/loop.h b/deal.II/include/deal.II/meshworker/loop.h
index 73b01b34756f67af101889017b91df83a2192d27..e263a0ef36ebb0910887eae89a585bd90382fe42 100644 (file)
--- a/deal.II/include/deal.II/meshworker/loop.h
+++ b/deal.II/include/deal.II/meshworker/loop.h
@@ -28,6 +28,7 @@
 DEAL_II_NAMESPACE_OPEN
 
 template <typename> class TriaActiveIterator;
+template <typename> class FilteredIterator;
 
 namespace internal
 {