[gnome-control-center] network: Don't try to show a wizard that failed to setup

[Richard Hughes <rhughes src gnome org>]

commit 59b7500fb64e907fef101ef5607d721e04b0ebe2
Author: Richard Hughes <richard hughsie com>
Date:   Thu Jun 28 13:41:29 2012 +0100

    network: Don't try to show a wizard that failed to setup
    
    This fixes a critical warning when mobile-broadband-provider-info isn't
    installed into the correct prefix.

 panels/network/network-dialogs.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/panels/network/network-dialogs.c b/panels/network/network-dialogs.c
index 9721e61..bdbd0f0 100644
--- a/panels/network/network-dialogs.c
+++ b/panels/network/network-dialogs.c
@@ -485,9 +485,17 @@ cc_network_panel_connect_to_3g_network (CcNetworkPanel   *panel,
 	if (caps & NM_DEVICE_MODEM_CAPABILITY_GSM_UMTS) {
                 wizard = nma_mobile_wizard_new (GTK_WINDOW (toplevel), NULL, NM_DEVICE_MODEM_CAPABILITY_GSM_UMTS, FALSE,
                                                 gsm_mobile_wizard_done, closure);
+		if (wizard == NULL) {
+			g_warning ("failed to construct GSM wizard");
+			return;
+		}
 	} else if (caps & NM_DEVICE_MODEM_CAPABILITY_CDMA_EVDO) {
 		wizard = nma_mobile_wizard_new (GTK_WINDOW (toplevel), NULL, NM_DEVICE_MODEM_CAPABILITY_CDMA_EVDO, FALSE,
                                                 cdma_mobile_wizard_done, closure);
+		if (wizard == NULL) {
+			g_warning ("failed to construct CDMA wizard");
+			return;
+		}
         } else {
                 g_warning ("Network panel loaded with connect-3g but the selected device"
                            " does not support GSM or CDMA");