silence unused variables warning

diff --git a/include/deal.II/matrix_free/matrix_free.templates.h b/include/deal.II/matrix_free/matrix_free.templates.h
index fd119ddb61bf0d466dac5a359388772b882dfcb8..3f317a1c95cb973196c5a1cccee8456608cea8aa 100644 (file)
--- a/include/deal.II/matrix_free/matrix_free.templates.h
+++ b/include/deal.II/matrix_free/matrix_free.templates.h
@@ -72,6 +72,7 @@ namespace internal
     const unsigned int n_dof_handlers,
     const unsigned int dof_handler_index)
   {
+    (void)n_dof_handlers;
     AssertDimension(dof_handler.size(), n_dof_handlers);
     return *dof_handler[dof_handler_index];
   }
@@ -92,6 +93,7 @@ namespace internal
     const unsigned int n_dof_handlers,
     const unsigned int dof_handler_index)
   {
+    (void)n_dof_handlers;
     AssertDimension(hp_dof_handler.size(), n_dof_handlers);
     return *hp_dof_handler[dof_handler_index];
   }