* Got rid of the DVD_DEVICE macro. We now use the dvd_device config option.
  ( this creates a small memory leak as we don't free the string obtained
    from config_GetPszVariable, but I think we can live with it for now )

* the SSE plugins are disable on the mingw32 build as they don't work.
  ( because memalign is not implemented on win32, and malloc only aligns
    on an 8 bytes boundary )

* fixed small mistake in INSTALL.win32