libxshmfence: Changes to 'master'

[Matt Turner]

 src/xshmfence_futex.h |    1 +
 1 file changed, 1 insertion(+)

New commits:
commit 30d946bc7b522ada9ec2fdbd502f9e36aae21bba
Author: Michał Górny <mgorny at gentoo.org>
Date:   Thu Feb 22 19:23:38 2018 +0100

    Fix missing <limits.h> include for HAVE_UMTX branch of futex
    
    This fixes build on Gentoo/FreeBSD which failed due to undefined
    'INT_MAX'.
    
    Signed-off-by: Michał Górny <mgorny at gentoo.org>
    Signed-off-by: Matt Turner <mattst88 at gmail.com>