[PATCH:xf86-video-mga] Fix pointer cast warning.

[Mark Kettenis]

> Date: Mon, 23 Feb 2015 22:55:51 -0800
> From: Alan Coopersmith <alan.coopersmith at oracle.com>
> 
> On 02/23/15 10:36 PM, Mark Kettenis wrote:
> >>   cast to pointer from integer of different size
> >>   [-Werror=int-to-pointer-cast]
> >>
> >>   Signed-off-by: Thomas Klausner <wiz at NetBSD.org>
> >>   ---
> >>    src/mga_exa.c | 2 +-
> >>    1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > This code makes no sense to me.  exaGetPixmapFirstPixel() returns a pixel
> > value.  Interpreting that as a pointer to the first pixel must be wrong.
> >
> > Note that the actual usage of mgaDownloadFromScreen() is #if 0'ed out.
> 
> Perhaps in your copy, but not upstream:
> 
> http://cgit.freedesktop.org/xorg/driver/xf86-video-mga/tree/src/mga_exa.c#n896

He, right.  Mattieu Herrb disabled this locally in OpenBSD's xenocara:

  revision 1.7
  date: 2013/06/14 21:21:54;  author: matthieu;  state: Exp;  lines: +2 -0;
  Disable broken EXA operations for now.

Breakage was probably introduced with commit
e9109a0b04695d6971c94abe271dda2dc1a5e886.  Not sure if simply
reverting that commit is an option.