[PATCH:libXaw] Fix abs() usage.

[Matt Turner]

On Wed, Jul 16, 2014 at 9:44 AM, Thomas Klausner <wiz at netbsd.org> wrote:
> Review please!
>
> Thanks,
>  Thomas

Reviewed-by: Matt Turner <mattst88 at gmail.com>

Please apply to libXaw3d as well.