[glib] Fix memory leaks in GNetworkMonitorNetlink

[Matthias Clasen <matthiasc src gnome org>]

commit 4215c0ce9158288619308c5fa6d2aa57ed4506b7
Author: Milan Crha <mcrha redhat com>
Date:   Fri May 27 07:30:00 2016 +0000

    Fix memory leaks in GNetworkMonitorNetlink
    
    As claimed by valgrind in a downstream bug report:
    https://bugzilla.redhat.com/show_bug.cgi?id=1317369
    
    https://bugzilla.gnome.org/show_bug.cgi?id=766933

 gio/gnetworkmonitornetlink.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/gio/gnetworkmonitornetlink.c b/gio/gnetworkmonitornetlink.c
index b9ff011..776628b 100644
--- a/gio/gnetworkmonitornetlink.c
+++ b/gio/gnetworkmonitornetlink.c
@@ -295,7 +295,7 @@ read_netlink_messages (GSocket      *socket,
   gssize len;
   gint flags;
   GError *error = NULL;
-  GSocketAddress *addr;
+  GSocketAddress *addr = NULL;
   struct nlmsghdr *msg;
   struct rtmsg *rtmsg;
   struct rtattr *attr;
@@ -326,6 +326,7 @@ read_netlink_messages (GSocket      *socket,
   if (len < 0)
     {
       g_warning ("Error on netlink socket: %s", error->message);
+      g_clear_object (&addr);
       g_error_free (error);
       if (nl->priv->dump_networks)
         finish_dump (nl);
@@ -335,6 +336,7 @@ read_netlink_messages (GSocket      *socket,
   if (!g_socket_address_to_native (addr, &source_sockaddr, sizeof (source_sockaddr), &error))
     {
       g_warning ("Error on netlink socket: %s", error->message);
+      g_clear_object (&addr);
       g_error_free (error);
       if (nl->priv->dump_networks)
         finish_dump (nl);
@@ -425,6 +427,7 @@ read_netlink_messages (GSocket      *socket,
 
  done:
   g_free (iv.buffer);
+  g_clear_object (&addr);
 
   if (!retval && nl->priv->dump_networks)
     finish_dump (nl);