* ./plugins/gtk/gtk_menu.c: fixed a compile issue on IA64.

  * ./plugins/gtk/gtk_menu.c: fixed a compile issue on IA64.
  * ./plugins/fx/scope.c: new toy plugin, an audio scope module.

    Each time I fix a bug in vlc I feel urge to code something useless. This
    one is very, very rough for the moment, probably buggy, slow, will crash
    your blender and reboot your fridge. Screenshot can be found here:
      http://www.zoy.org/~sam/vlc/vlc-scope.jpeg
    Activate with `--aout scope' (yes, it currently disables the real
    audio output... I'll fix this as well).