[gnome-control-center] wifi: Use g_signal_connect_object

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 3642cb2d825248f1ec38e0dbd8fea5ea14193e6e
Author: Robert Ancell <robert ancell canonical com>
Date:   Mon Aug 6 10:28:39 2018 +1200

    wifi: Use g_signal_connect_object
    
    The previous code used the g_signal_connect which could leave the signals
    connected even after the NetDeviceWifi object was destroyed.
    
    Automatic crash reports in Ubuntu indicate that this might be happening:
    https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1718727

 panels/network/net-device-wifi.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/panels/network/net-device-wifi.c b/panels/network/net-device-wifi.c
index b2d5b3d5f..3d3a54d80 100644
--- a/panels/network/net-device-wifi.c
+++ b/panels/network/net-device-wifi.c
@@ -1597,10 +1597,10 @@ net_device_wifi_constructed (GObject *object)
         } else
                 gtk_widget_set_sensitive (widget, TRUE);
 
-        g_signal_connect (client, NM_CLIENT_CONNECTION_ADDED,
-                          G_CALLBACK (client_connection_added_cb), device_wifi);
-        g_signal_connect (client, NM_CLIENT_CONNECTION_REMOVED,
-                          G_CALLBACK (client_connection_removed_cb), device_wifi);
+        g_signal_connect_object (client, NM_CLIENT_CONNECTION_ADDED,
+                                 G_CALLBACK (client_connection_added_cb), device_wifi, 0);
+        g_signal_connect_object (client, NM_CLIENT_CONNECTION_REMOVED,
+                                 G_CALLBACK (client_connection_removed_cb), device_wifi, 0);
 
         widget = GTK_WIDGET (gtk_builder_get_object (device_wifi->priv->builder, "heading_list"));
         g_object_bind_property (device_wifi, "title", widget, "label", 0);