Re: winex11: Add a few 'fall through' comments.

[Dmitry Timoshkov]

Huw Davies  wrote:
>  case DirectColor:
>
> X11DRV_PALETTE_PaletteFlags |= X11DRV_PALETTE_VIRTUAL;
> - case GrayScale:
> - case GrayScale: /* fall through */

case DirectColor:
    X11DRV_PALETTE_PaletteFlags |= X11DRV_PALETTE_VIRTUAL;
        /* fall through */
    case GrayScale:

would be more clear IMHO. Right now it's not obvious to which case statement
'fall through' belongs to.

Same for other changes.