signal with class offset , but never used in nautilus_file and nautilus_directory

[gachen gachen <pipigachen gmail com>]

Hi,

in nautilus-file.c 
    signals[CHANGED] =
        g_signal_new ("changed",
                      G_TYPE_FROM_CLASS (class),
                      G_SIGNAL_RUN_LAST,
                      G_STRUCT_OFFSET (NautilusFileClass, changed),
                      NULL, NULL,
                      g_cclosure_marshal_VOID__VOID,
                      G_TYPE_NONE, 0);

    signals[UPDATED_DEEP_COUNT_IN_PROGRESS] =
        g_signal_new ("updated_deep_count_in_progress",
                      G_TYPE_FROM_CLASS (class),
                      G_SIGNAL_RUN_LAST,
                      G_STRUCT_OFFSET (NautilusFileClass, updated_deep_count_in_progress),
                      NULL, NULL,
                  g_cclosure_marshal_VOID__VOID,
                      G_TYPE_NONE, 0);

but , none of "changed" and "updated_deep_count_in_progress"  is defined. So should we set the class offset to NULL?

the same problem also in nautilus-directory.c , for signal, "files_added", "files_changed", "done_loading" and "load_error".

Br, Chen Gang