[glom] Use latest Glib::SignalProxy syntax.

[Murray Cumming <murrayc src gnome org>]

commit 6b38d4ab99102c5c67b095f7ef67053bb75e08a6
Author: Murray Cumming <murrayc murrayc com>
Date:   Sun Dec 18 12:12:04 2016 +0100

    Use latest Glib::SignalProxy syntax.

 .../eggspreadtablemm/eggspreadtabledndmm.cc        |    4 ++--
 .../eggspreadtablemm/eggspreadtabledndmm.h         |    2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/glom/utility_widgets/eggspreadtablemm/eggspreadtabledndmm.cc 
b/glom/utility_widgets/eggspreadtablemm/eggspreadtabledndmm.cc
index 7613b2e..7160911 100644
--- a/glom/utility_widgets/eggspreadtablemm/eggspreadtabledndmm.cc
+++ b/glom/utility_widgets/eggspreadtablemm/eggspreadtabledndmm.cc
@@ -297,9 +297,9 @@ bool SpreadTableDnd::on_widget_drop_possible(Gtk::Widget* widget, bool& drop_pos
     return false;
 }
 
-Glib::SignalProxy2< bool, Gtk::Widget*, bool& > SpreadTableDnd::signal_widget_drop_possible()
+Glib::SignalProxy<bool(Gtk::Widget*, bool&)> SpreadTableDnd::signal_widget_drop_possible()
 {
-  return Glib::SignalProxy2< bool, Gtk::Widget*, bool& >(this, 
&SpreadTableDnd_signal_widget_drop_possible_info);
+  return Glib::SignalProxy<bool(Gtk::Widget*, bool&)>(this, 
&SpreadTableDnd_signal_widget_drop_possible_info);
 }
 
 } // namespace Egg
diff --git a/glom/utility_widgets/eggspreadtablemm/eggspreadtabledndmm.h 
b/glom/utility_widgets/eggspreadtablemm/eggspreadtabledndmm.h
index 6ce031d..c33b2a1 100644
--- a/glom/utility_widgets/eggspreadtablemm/eggspreadtabledndmm.h
+++ b/glom/utility_widgets/eggspreadtablemm/eggspreadtabledndmm.h
@@ -106,7 +106,7 @@ public:
    * <tt>void on_my_%widget_drop_possible()</tt>
    */
 
-  Glib::SignalProxy<bool(Gtk::Widget*, bool)> signal_widget_drop_possible();
+  Glib::SignalProxy<bool(Gtk::Widget*, bool&)> signal_widget_drop_possible();
 };
 
 } // namespace Egg