From 5e20d16dd4060a785358fd0860cf5bffd5b23c09 Mon Sep 17 00:00:00 2001
From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Mon, 10 Jul 2023 09:04:40 +1000
Subject: [PATCH] Don't try to enable a NULL device

If there is no other libinput device in our list (and next is thus NULL),
skip the xf86AddEnabledDevice() call.

Fixes #60
---
 src/xf86libinput.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/xf86libinput.c b/src/xf86libinput.c
index f7a7553..934a312 100644
--- a/src/xf86libinput.c
+++ b/src/xf86libinput.c
@@ -1505,7 +1505,8 @@ swap_registered_device(InputInfoPtr pInfo)
 
 	input_lock();
 	xf86RemoveEnabledDevice(pInfo);
-	xf86AddEnabledDevice(next);
+	if (next)
+		xf86AddEnabledDevice(next);
 	driver_context.registered_InputInfoPtr = next;
 	input_unlock();
 }