[libsigcplusplus] tuple_transform_each: Don't use typename for a template template parameter.

[Murray Cumming <murrayc src gnome org>]

commit f079a8e43ce3bdd280c82716d770405a19146efa
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Apr 19 21:39:09 2016 +0200

    tuple_transform_each: Don't use typename for a template template parameter.

 sigc++/tuple-utils/tuple_transform_each.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/sigc++/tuple-utils/tuple_transform_each.h b/sigc++/tuple-utils/tuple_transform_each.h
index 55d2e31..ff7b6a4 100644
--- a/sigc++/tuple-utils/tuple_transform_each.h
+++ b/sigc++/tuple-utils/tuple_transform_each.h
@@ -68,7 +68,7 @@ struct tuple_transform_each_impl
   }
 };
 
-template <template <typename> typename T_transformer>
+template <template <typename> class T_transformer>
 struct tuple_transform_each_impl<T_transformer, 1>
 {
   template <typename T_current, typename T_original>