[gthumb] fixed run-time warning about visible but unmapped children

[Paolo Bacchilega <paobac src gnome org>]

commit 498339ec6a89cc6e47cbfd4a39228956ac12ab93
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sat Jan 19 18:58:57 2013 +0100

    fixed run-time warning about visible but unmapped children

 gthumb/gth-browser.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/gthumb/gth-browser.c b/gthumb/gth-browser.c
index 7098a32..e687daf 100644
--- a/gthumb/gth-browser.c
+++ b/gthumb/gth-browser.c
@@ -4015,10 +4015,12 @@ pref_ui_viewer_thumbnails_orient_changed (GSettings  *settings,
 	child2 = gtk_paned_get_child2 (GTK_PANED (browser->priv->viewer_thumbnails_pane));
 
 	g_object_ref (child1);
+	gtk_widget_set_visible (child1, FALSE);
 	gtk_widget_unrealize (child1);
 	gtk_container_remove (GTK_CONTAINER (browser->priv->viewer_thumbnails_pane), child1);
 
 	g_object_ref (child2);
+	gtk_widget_set_visible (child2, FALSE);
 	gtk_widget_unrealize (child2);
 	gtk_container_remove (GTK_CONTAINER (browser->priv->viewer_thumbnails_pane), child2);
 
@@ -4031,6 +4033,9 @@ pref_ui_viewer_thumbnails_orient_changed (GSettings  *settings,
 		gtk_paned_pack2 (GTK_PANED (viewer_thumbnails_pane), browser->priv->viewer_sidebar_pane, TRUE, FALSE);
 	}
 
+	gtk_widget_set_visible (child1, TRUE);
+	gtk_widget_set_visible (child2, TRUE);
+
 	g_object_notify (G_OBJECT (child1), "parent");
 	g_object_unref (child1);