[mutter/wip/carlosg/fix-x11-wacom-device] backends: Consider pen/eraser devices when looking for matching WacomDevice

[Carlos Garnacho <carlosg src gnome org>]

commit e512c397a640994807f239c570333e9942717ef5
Author: Carlos Garnacho <carlosg gnome org>
Date:   Fri Dec 13 17:01:44 2019 +0100

    backends: Consider pen/eraser devices when looking for matching WacomDevice
    
    Those device types are still in use through the X11 backend, breaking some
    checks around on that backend...
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/972

 src/backends/meta-input-settings.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/backends/meta-input-settings.c b/src/backends/meta-input-settings.c
index 2e6672d9c..18ae52dd7 100644
--- a/src/backends/meta-input-settings.c
+++ b/src/backends/meta-input-settings.c
@@ -1589,6 +1589,8 @@ check_add_mappable_device (MetaInputSettings  *input_settings,
 
 #ifdef HAVE_LIBWACOM
   if (device_type == CLUTTER_TABLET_DEVICE ||
+      device_type == CLUTTER_PEN_DEVICE ||
+      device_type == CLUTTER_ERASER_DEVICE ||
       device_type == CLUTTER_PAD_DEVICE)
     {
       WacomError *error = libwacom_error_new ();