[goffice] [goc] Minor initialization for canvas widgets

[Jody Goldberg <jody src gnome org>]

commit 9746610678e7c9a6b6a1b2eeb378f91685a86e4c
Author: Jody Goldberg <jody gnome org>
Date:   Thu Nov 17 05:18:43 2011 -0500

    [goc] Minor initialization for canvas widgets
    
    Be sure to NULL the ptr after unref

 ChangeLog                   |    5 +++++
 goffice/canvas/goc-widget.c |    1 +
 2 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index d76ba63..4b085ad 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2011-11-16  Jody Goldberg <jody gnome org>
+
+	* goffice/canvas/goc-widget.c (goc_widget_set_widget) : clear the ofbox
+	  after unref.  Fixes slicer view combo.
+
 2011-11-14  Jean Brefort  <jean brefort normalesup org>
 
 	* goffice/canvas/goc-component.c (goc_component_set_property): don't change
diff --git a/goffice/canvas/goc-widget.c b/goffice/canvas/goc-widget.c
index 4f6621f..1cb251d 100644
--- a/goffice/canvas/goc-widget.c
+++ b/goffice/canvas/goc-widget.c
@@ -594,6 +594,7 @@ goc_widget_set_widget (GocWidget *item, GtkWidget *widget)
 					      item->ofbox);
 
 		g_object_unref (item->ofbox);
+		item->ofbox = NULL;
 		g_object_unref (item->widget);
 	}