[gnome-control-center] Network: Avoid warnings

[Matthias Clasen <matthiasc src gnome org>]

commit d1be44ba223504af995aa2c5a708f02b89e857bc
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Mar 17 08:54:44 2011 -0400

    Network: Avoid warnings

 panels/network/cc-network-panel.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/panels/network/cc-network-panel.c b/panels/network/cc-network-panel.c
index 2e73d58..3e88630 100644
--- a/panels/network/cc-network-panel.c
+++ b/panels/network/cc-network-panel.c
@@ -616,7 +616,8 @@ panel_set_widget_heading (CcNetworkPanel *panel,
 
         label_id = g_strdup_printf ("heading_%s_%s", sub_pane, widget_suffix);
         widget = GTK_WIDGET (gtk_builder_get_object (panel->priv->builder, label_id));
-        gtk_label_set_label (GTK_LABEL (widget), heading);
+        if (widget)
+                gtk_label_set_label (GTK_LABEL (widget), heading);
         g_free (label_id);
 }