[gtksourceviewmm] tests: Use the libsigc++-3.0 syntax.

[Murray Cumming <murrayc src gnome org>]

commit eb4c8bb4e5a583b2f3e30575e3b0af01d79f4583
Author: Murray Cumming <murrayc murrayc com>
Date:   Mon Nov 14 12:09:57 2016 +0100

    tests: Use the libsigc++-3.0 syntax.

 tests/completion/main.cc |    8 ++++----
 tests/search/main.cc     |    8 ++++----
 2 files changed, 8 insertions(+), 8 deletions(-)
---
diff --git a/tests/completion/main.cc b/tests/completion/main.cc
index 65665af..cbb4ce2 100644
--- a/tests/completion/main.cc
+++ b/tests/completion/main.cc
@@ -172,10 +172,10 @@ TestWindow::TestWindow()
   vbox->pack_start(*scrolledwindow, true, true);
   vbox->pack_end(*hbox, false, false);
 
-  m_remember->signal_toggled().connect(sigc::mem_fun(this, &TestWindow::remember_toggled));
-  m_select_on_show->signal_toggled().connect(sigc::mem_fun(this, &TestWindow::select_on_show_toggled));
-  m_show_headers->signal_toggled().connect(sigc::mem_fun(this, &TestWindow::show_headers_toggled));
-  m_show_icons->signal_toggled().connect(sigc::mem_fun(this, &TestWindow::show_icons_toggled));
+  m_remember->signal_toggled().connect(sigc::mem_fun(*this, &TestWindow::remember_toggled));
+  m_select_on_show->signal_toggled().connect(sigc::mem_fun(*this, &TestWindow::select_on_show_toggled));
+  m_show_headers->signal_toggled().connect(sigc::mem_fun(*this, &TestWindow::show_headers_toggled));
+  m_show_icons->signal_toggled().connect(sigc::mem_fun(*this, &TestWindow::show_icons_toggled));
 
   add(*vbox);
 //completion
diff --git a/tests/search/main.cc b/tests/search/main.cc
index 17c3261..0de4ce4 100644
--- a/tests/search/main.cc
+++ b/tests/search/main.cc
@@ -34,8 +34,8 @@ class SearchDialog : public Dialog {
     Gtk::Entry *m_entry ;
     Gtk::Button *m_search_forward_button ;
     Gtk::Button *m_search_backward_button ;
-    sigc::signal<void> m_forward_search_requested_signal ;
-    sigc::signal<void> m_backward_search_requested_signal ;
+    sigc::signal<void()> m_forward_search_requested_signal ;
+    sigc::signal<void()> m_backward_search_requested_signal ;
 
     void init_members ()
     {
@@ -100,12 +100,12 @@ public:
         a_str = m_entry->get_text () ;
     }
 
-    sigc::signal<void>& forward_search_requested_signal ()
+    sigc::signal<void()>& forward_search_requested_signal ()
     {
         return m_forward_search_requested_signal ;
     }
 
-    sigc::signal<void>& backward_search_requested_signal ()
+    sigc::signal<void()>& backward_search_requested_signal ()
     {
         return m_backward_search_requested_signal ;
     }