[libsigc++2/variadic] adaptor_functor: Make deduce_result_type variadic.

[Murray Cumming <murrayc src gnome org>]

commit 1c269694523ce899850708d9ecaad525bdaf6ee2
Author: Murray Cumming <murrayc murrayc com>
Date:   Thu Jan 7 17:52:06 2016 +0100

    adaptor_functor: Make deduce_result_type variadic.
    
    Instead of having all 7 arguments, defaulting to void.

 sigc++/adaptors/macros/adaptor_trait.h.m4 |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/sigc++/adaptors/macros/adaptor_trait.h.m4 b/sigc++/adaptors/macros/adaptor_trait.h.m4
index a7a0613..74ebb61 100644
--- a/sigc++/adaptors/macros/adaptor_trait.h.m4
+++ b/sigc++/adaptors/macros/adaptor_trait.h.m4
@@ -132,9 +132,9 @@ template <class T_functor>
 struct adaptor_functor : public adaptor_base
 {
 #ifndef DOXYGEN_SHOULD_SKIP_THIS
-  template <LOOP(class T_arg%1=void, CALL_SIZE)>
+  template <class... T_arg>
   struct deduce_result_type
-    { typedef sigc::deduce_result_t<LIST(T_functor, LOOP(T_arg%1,CALL_SIZE))> type; };
+    { typedef sigc::deduce_result_t<T_functor, T_arg...> type; };
 #endif
   typedef typename functor_trait<T_functor>::result_type result_type;