Fix opaque type problem in derivative_approximation.h

git-svn-id: https://svn.dealii.org/branches/branch_port_the_testsuite@31262 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/include/deal.II/numerics/derivative_approximation.h b/deal.II/include/deal.II/numerics/derivative_approximation.h
index 31a3b118c829727665cba8a793f14cb25a7575eb..3b47dd39041b1dd677e1e54af54aab27b6442367 100644 (file)
--- a/deal.II/include/deal.II/numerics/derivative_approximation.h
+++ b/deal.II/include/deal.II/numerics/derivative_approximation.h
@@ -23,6 +23,7 @@
 #include <deal.II/base/synchronous_iterator.h>
 #include <deal.II/fe/fe_update_flags.h>
 #include <deal.II/fe/mapping.h>
+#include <deal.II/lac/vector.h>
 #include <utility>
 
 DEAL_II_NAMESPACE_OPEN
@@ -676,7 +677,7 @@ private:
            template <int, int> class DH, class InputVector, int spacedim>
   static void
   approximate (SynchronousIterators<std_cxx1x::tuple<typename DH<dim,spacedim>
-               ::active_cell_iterator,Vector<float>::iterator> > const &cell,              
+               ::active_cell_iterator,Vector<float>::iterator> > const &cell,
                const Mapping<dim,spacedim>    &mapping,
                const DH<dim,spacedim>         &dof,
                const InputVector     &solution,