[gtkmm] Fix the build with --enable-warnings=fatal, partly.

[Murray Cumming <murrayc src gnome org>]

commit ba0de9a629205bf2c0321a3241caa94a472ef82a
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue May 7 22:16:24 2013 +0200

    Fix the build with --enable-warnings=fatal, partly.
    
        * tools/extra_defs_gen/generate_defs_gtk.cc: Add a define of
        GDK_DISABLE_DEPRECATION_WARNINGS, though I do not know why this is only
        necessary now, using GTK+ from git master.

 ChangeLog                                 |    8 ++++++++
 tools/extra_defs_gen/generate_defs_gtk.cc |    1 +
 2 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index bd5e078..28ea456 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2013-05-07  Murray Cumming  <murrayc murray com>
+
+       Fix the build with --enable-warnings=fatal, partly.
+
+       * tools/extra_defs_gen/generate_defs_gtk.cc: Add a define of
+       GDK_DISABLE_DEPRECATION_WARNINGS, though I do not know why this is only
+       necessary now, using GTK+ from git master.
+
 2013-04-29  Kjell Ahlstedt  <kjell ahlstedt bredband net>
 
        Gtk::Widget: Don't call signal_hide handlers on a widget being deleted.
diff --git a/tools/extra_defs_gen/generate_defs_gtk.cc b/tools/extra_defs_gen/generate_defs_gtk.cc
index d078eb5..60eacfb 100644
--- a/tools/extra_defs_gen/generate_defs_gtk.cc
+++ b/tools/extra_defs_gen/generate_defs_gtk.cc
@@ -25,6 +25,7 @@
 #undef GDK_PIXBUF_DISABLE_DEPRECATED
 #undef GDK_DISABLE_DEPRECATED
 #undef GTK_DISABLE_DEPRECATED
+#define GDK_DISABLE_DEPRECATION_WARNINGS 1
 
 #include <glibmm_generate_extra_defs/generate_extra_defs.h>
 #include <gdk-pixbuf/gdk-pixbuf.h>