[gnome-control-center] network: Fix compilation warnings

[Bastien Nocera <hadess src gnome org>]

commit ab2b13cacd1e076541e425d879659dcd245820ba
Author: Bastien Nocera <hadess hadess net>
Date:   Fri Sep 16 16:51:14 2016 +0200

    network: Fix compilation warnings
    
    Those come from the fixes made in commits 981c354 and 7f601cf.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=771538

 panels/network/connection-editor/ce-page-ip4.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/panels/network/connection-editor/ce-page-ip4.c b/panels/network/connection-editor/ce-page-ip4.c
index f747f39..cfade76 100644
--- a/panels/network/connection-editor/ce-page-ip4.c
+++ b/panels/network/connection-editor/ce-page-ip4.c
@@ -686,7 +686,7 @@ ui_to_setting (CEPageIP4 *page)
                 }
         }
 
-        addresses = g_ptr_array_new_with_free_func (nm_ip_address_unref);
+        addresses = g_ptr_array_new_with_free_func ((GDestroyNotify) nm_ip_address_unref);
         if (g_str_equal (method, NM_SETTING_IP4_CONFIG_METHOD_MANUAL))
                 children = gtk_container_get_children (GTK_CONTAINER (page->address_list));
         else
@@ -794,7 +794,7 @@ ui_to_setting (CEPageIP4 *page)
                 g_ptr_array_add (dns_servers, NULL);
         }
 
-        routes = g_ptr_array_new_with_free_func (nm_ip_route_unref);
+        routes = g_ptr_array_new_with_free_func ((GDestroyNotify) nm_ip_route_unref);
         if (g_str_equal (method, NM_SETTING_IP4_CONFIG_METHOD_AUTO) ||
             g_str_equal (method, NM_SETTING_IP4_CONFIG_METHOD_MANUAL))
                 children = gtk_container_get_children (GTK_CONTAINER (page->routes_list));