[gnumeric] Make it build again with glib < 2.32

[Jean Bréfort <jbrefort src gnome org>]

commit 8080632db3de7dc4067f7785f1d6b2a6149e8da8
Author: Jean Brefort <jean brefort normalesup org>
Date:   Fri Aug 9 19:06:20 2013 +0200

    Make it build again with glib < 2.32

 src/sheet-object-widget.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/src/sheet-object-widget.c b/src/sheet-object-widget.c
index 3351371..9e7ce16 100644
--- a/src/sheet-object-widget.c
+++ b/src/sheet-object-widget.c
@@ -1285,6 +1285,10 @@ enum {
 
 static GType sheet_widget_adjustment_get_type (void);
 
+#ifndef g_signal_handlers_disconnect_by_data
+#define g_signal_handlers_disconnect_by_data(instance, data) \
+  g_signal_handlers_disconnect_matched ((instance), G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, (data))
+#endif
 static void
 cb_range_destroyed (GtkWidget *w, SheetWidgetAdjustment *swa)
 {