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

[Thomas Klausner]

On Sat, Aug 01, 2015 at 12:02:27AM -0400, Connor Behan wrote:
> I just looked through the drivers on the main site and found 7
> problematic ones.
> 
> * Geode is not careful enough with pSrc and its drawables
> * Mga is not careful enough either, plus it has a useless DFS hook
> * Radeonhd is not careful enough with pSrc / drawables
> * Siliconmotion is not careful enough with the drawable
> * Sis has useless UTS / DFS hooks but its wrappers do a good job of
> hiding this
> * Via is not careful enough with pSrc / drawables and it uses devPrivate
> all over the place
> * Xgi's UTS / DFS hooks are useless (except maybe on ARM) and it uses
> devPrivate
> 
> Do people want to pick one to work on? I can start, but I'll need
> someone else to push the patches.

I'd be glad to push your patches.

For the record:
geode, mga, siliconmotion, sis, and xgi are still part of NetBSD's xsrc.
(radeonhd and via are not.)

I'll happily dig up the NetBSD xsrc diffs for them if someone is
willing to review them.
 Thomas