[PATCH xserver] config: fix NULL value detection for ID_INPUT being unset

[Adam Jackson]

On Fri, 2018-01-05 at 11:58 +1000, Peter Hutterer wrote:
> Erroneous condition caused us to keep going with all devices that
> didn't have
> ID_INPUT set.
> 
> Introduced in 5aad81445c8c3d6
> 
> https://bugs.freedesktop.org/show_bug.cgi?id=104382
> 
> Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>

Merged, thanks!

remote: I: patch #196090 updated using rev a309323328d9d6e0bf5d9ea1d75920e53b9beef3.
remote: I: 1 patch(es) updated to state Accepted.
To ssh://git.freedesktop.org/git/xorg/xserver
   dbfbe58b94..a309323328  master -> master

- ajax