[goffice] Don't unref a disposed widget. [#698150]

[Jean Bréfort <jbrefort src gnome org>]

commit 3e0db576037b2044e5546c5a19fb89c415a5ccd7
Author: Jean Brefort <jean brefort normalesup org>
Date:   Tue Apr 16 19:26:20 2013 +0200

    Don't unref a disposed widget. [#698150]

 ChangeLog                 | 6 ++++++
 NEWS                      | 1 +
 goffice/utils/go-editor.c | 2 +-
 3 files changed, 8 insertions(+), 1 deletion(-)
---
diff --git a/ChangeLog b/ChangeLog
index 1cd0626..344c566 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 2013-04-16  Jean Brefort  <jean brefort normalesup org>
 
+       * goffice/utils/go-editor.c (go_editor_add_page): add a reference to the
+       widget when not using a scrolled window. Avoids unrefing a disposed object.
+       [#698150]
+
+2013-04-16  Jean Brefort  <jean brefort normalesup org>
+
        * goffice/canvas/goc-item.c (goc_item_set_transform): fix test. [#698101]
        * goffice/utils/go-editor.c (go_editor_new): initialize
        GOEditor::use_scrolled. [#698102]
diff --git a/NEWS b/NEWS
index 370f404..965e0af 100644
--- a/NEWS
+++ b/NEWS
@@ -13,6 +13,7 @@ Jean:
        series. [#698057]
        * Fixed test in goc_item_set_transform(). [#698101]
        * Iinitialize GOEditor::use_scrolled. [#698102]
+       * Don't unref a disposed widget. [#698150]
 
 Morten:
        * Fix problems with cspline boxed type. [#695550]
diff --git a/goffice/utils/go-editor.c b/goffice/utils/go-editor.c
index 0d24770..76b9584 100644
--- a/goffice/utils/go-editor.c
+++ b/goffice/utils/go-editor.c
@@ -136,7 +136,7 @@ go_editor_add_page (GOEditor *editor, gpointer widget, char const *label)
                gtk_scrolled_window_add_with_viewport (GTK_SCROLLED_WINDOW (page->scrolled),
                                                           widget);
        } else
-               page->scrolled = widget;
+               page->scrolled = g_object_ref (widget);
        page->label = label;
 
        editor->pages = g_slist_prepend (editor->pages, page);