[mutter/wip/carlosg/tablet-cursor-surface-events: 1/2] wayland: Handle NULL cursor renderer finding the outputs of a cursor role

[Carlos Garnacho <carlosg src gnome org>]

commit 0cc84936189898c2b47218559c93ef28de3bb1be
Author: Carlos Garnacho <carlosg gnome org>
Date:   Thu Apr 18 19:21:36 2019 +0200

    wayland: Handle NULL cursor renderer finding the outputs of a cursor role
    
    Having a cursor role with a NULL renderer is valid state, and even desirable
    on tablets (eg. after proximity out). In those cases it should be
    interpreted as the cursor surface not being over any output.
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/545

 src/wayland/meta-wayland-cursor-surface.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/src/wayland/meta-wayland-cursor-surface.c b/src/wayland/meta-wayland-cursor-surface.c
index d46b3511f..df3e34510 100644
--- a/src/wayland/meta-wayland-cursor-surface.c
+++ b/src/wayland/meta-wayland-cursor-surface.c
@@ -188,6 +188,9 @@ meta_wayland_cursor_surface_is_on_logical_monitor (MetaWaylandSurfaceRole *role,
   ClutterPoint point;
   ClutterRect logical_monitor_rect;
 
+  if (!priv->cursor_renderer)
+    return FALSE;
+
   logical_monitor_rect =
     meta_rectangle_to_clutter_rect (&logical_monitor->rect);