[network-manager-applet] c-e: refactor mac_addres handling in get_device_for_connection() in "page-master.c"

[Thomas Haller <thaller src gnome org>]

commit fe9727632338315f256d350f36cd186f1072f3dc
Author: Thomas Haller <thaller redhat com>
Date:   Thu Jan 26 16:57:26 2017 +0100

    c-e: refactor mac_addres handling in get_device_for_connection() in "page-master.c"
    
    Use gs_free attribute to free the mac_address. Also, treat an empty
    mac_address string as NULL. Empty is invalid anyway and not expected.

 src/connection-editor/page-master.c |    7 ++-----
 1 files changed, 2 insertions(+), 5 deletions(-)
---
diff --git a/src/connection-editor/page-master.c b/src/connection-editor/page-master.c
index e73c08f..7e4ab73 100644
--- a/src/connection-editor/page-master.c
+++ b/src/connection-editor/page-master.c
@@ -196,18 +196,15 @@ get_device_for_connection (NMClient *client, NMConnection *conn)
        if (   !nm_setting_connection_get_interface_name (s_con)
               && !nm_connection_get_interface_name (conn)) {
                NMSetting *s_hw;
-               gchar *mac_address;
+               gs_free char *mac_address = NULL;
 
                s_hw = nm_connection_get_setting_by_name (conn, nm_setting_connection_get_connection_type 
(s_con));
                if (!s_hw || !g_object_class_find_property (G_OBJECT_GET_CLASS (s_hw), "mac-address"))
                        return NULL;
 
                g_object_get (G_OBJECT (s_hw), "mac-address", &mac_address, NULL);
-               if (!mac_address || !mac_address[0]) {
-                       g_free (mac_address);
+               if (!mac_address)
                        return NULL;
-               }
-               g_free (mac_address);
        }
 
        /* OK, now find that device */