[libsigc++2/variadic_bind2: 65/68] test_bind_ref: Fix the build.

[Murray Cumming <murrayc src gnome org>]

commit a80b73111fbd1da759ae8bb11b34919fb9a41186
Author: Murray Cumming <murrayc murrayc com>
Date:   Fri Feb 19 12:56:51 2016 +0100

    test_bind_ref: Fix the build.
    
    sigc::bind<>'s second template parameter is now the type of the functor.

 tests/test_bind_ref.cc |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/tests/test_bind_ref.cc b/tests/test_bind_ref.cc
index d8ea53b..f3e11c6 100644
--- a/tests/test_bind_ref.cc
+++ b/tests/test_bind_ref.cc
@@ -54,7 +54,7 @@ int main(int argc, char* argv[])
     Param param("murrayc");
     // A convoluted way to do
     // slot_bound = sigc::bind(slot_full, std::ref(param));
-    slot_bound = sigc::bind< -1, std::reference_wrapper<Param> >(slot_full, std::ref(param));
+    slot_bound = sigc::bind< -1, decltype(slot_full), std::reference_wrapper<Param> >(slot_full, 
std::ref(param));
 
     result_stream << "Calling slot when param exists:";
     slot_bound();