[libsigc++2] functor_trait.m4: Correct the mem_functor<> declarations.

[Murray Cumming <murrayc src gnome org>]

commit eb0139abd58b1fbe3dbf279f5d8cd60bdf46d571
Author: Murray Cumming <murrayc murrayc com>
Date:   Thu Jan 7 16:35:56 2016 +0100

    functor_trait.m4: Correct the mem_functor<> declarations.
    
    The first template types are T_return and T_obj, not the arguments.
    This doesn't seem to have been a problem. Maybe this code is not tested
    or used.

 sigc++/functors/macros/functor_trait.h.m4 |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/sigc++/functors/macros/functor_trait.h.m4 b/sigc++/functors/macros/functor_trait.h.m4
index 176fee2..59a9b9b 100644
--- a/sigc++/functors/macros/functor_trait.h.m4
+++ b/sigc++/functors/macros/functor_trait.h.m4
@@ -28,19 +28,19 @@ struct functor_trait<T_return (*)(LOOP(T_arg%1, $1)), false, false>
 
 ])
 define([FUNCTOR_MEM_FUN],[dnl
-template <LIST(LOOP(class T_arg%1, $1), class T_return, class T_obj)> class mem_functor$1;
-template <LIST(LOOP(class T_arg%1, $1), class T_return, class T_obj)> class const_mem_functor$1;
+template <LIST(class T_return, class T_obj, LOOP(class T_arg%1, $1))> class mem_functor$1;
+template <LIST(class T_return, class T_obj, LOOP(class T_arg%1, $1))> class const_mem_functor$1;
 template <LIST(LOOP(class T_arg%1, $1), class T_return, class T_obj)>
 struct functor_trait<T_return (T_obj::*)(LOOP(T_arg%1, $1)), false, false>
 {
   typedef T_return result_type;
-  typedef mem_functor$1<LIST(LOOP(T_arg%1, $1), T_return, T_obj)> functor_type;
+  typedef mem_functor$1<LIST(T_return, T_obj, LOOP(T_arg%1, $1))> functor_type;
 };
 template <LIST(LOOP(class T_arg%1, $1), class T_return, class T_obj)>
 struct functor_trait<T_return (T_obj::*)(LOOP(T_arg%1, $1)) const, false, false>
 {
   typedef T_return result_type;
-  typedef const_mem_functor$1<LIST(LOOP(T_arg%1, $1), T_return, T_obj)> functor_type;
+  typedef const_mem_functor$1<LIST(T_return, T_obj, LOOP(T_arg%1, $1))> functor_type;
 };
 
 ])