[dia] Sheets&Objects: make remove button work without complaints again

[Hans Breuer <hans src gnome org>]

commit fc50c0bc461264d8d01851a34fb6a76c529e14e0
Author: Hans Breuer <hans breuer org>
Date:   Fri Jul 16 13:06:59 2010 +0200

    Sheets&Objects: make remove button work without complaints again
    
    Not every widget is to be found from the builder, ask the original parent widget as a fallback for e.g. "wrapbox_left"

 app/sheets.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/app/sheets.c b/app/sheets.c
index cddf24b..f8e3037 100644
--- a/app/sheets.c
+++ b/app/sheets.c
@@ -402,6 +402,10 @@ lookup_widget (GtkWidget   *widget,
 
   builder = g_object_get_data (G_OBJECT (widget), "_sheet_dialogs_builder");
   found_widget = GTK_WIDGET (gtk_builder_get_object (builder, widget_name));
+  /* not everything is under control of the builder,
+   * e.g. "wrapbox_left" */
+  if (!found_widget)
+    found_widget = (GtkWidget*) g_object_get_data (G_OBJECT (widget), widget_name);
   if (!found_widget)
     g_warning (_("Widget not found: %s"), widget_name);
   return found_widget;