tcpserversink: Don't leak a GSocket and a GInetSocketAddress

when accepting a connection.

Discovered by `make check-valgrind` with the new `socketintegrationtest`.

https://bugzilla.gnome.org/show_bug.cgi?id=739544

gst/tcp/gstmultihandlesink.c

@@ -677,6 +677,10 @@ gst_multi_handle_sink_add_full (GstMultiHandleSink * sink,
   if (clink != NULL)
     goto duplicate;
 
+  /* We do not take ownership of @handle in this function, but we can't take a
+   * reference directly as we don't know the concrete type of the handle.
+   * GstMultiHandleSink relies on the derived class to take a reference for us
+   * in new_client: */
   mhclient = mhsinkclass->new_client (mhsink, handle, sync_method);
 
   /* we can add the handle now */

gst/tcp/gsttcpserversink.c

@@ -163,6 +163,7 @@ gst_tcp_server_sink_handle_server_read (GstTCPServerSink * sink)
     goto accept_failed;
 
   handle.socket = client_socket;
+  /* gst_multi_handle_sink_add does not take ownership of client_socket */
   gst_multi_handle_sink_add (GST_MULTI_HANDLE_SINK (sink), handle);
 
 #ifndef GST_DISABLE_GST_DEBUG
@@ -177,9 +178,11 @@ gst_tcp_server_sink_handle_server_read (GstTCPServerSink * sink)
         ip, g_inet_socket_address_get_port (addr), client_socket);
 
     g_free (ip);
+    g_object_unref (addr);
   }
 #endif
 
+  g_object_unref (client_socket);
   return TRUE;
 
   /* ERRORS */