[mutter] wayland-pointer: Bail unconditionally if without native backend

[Jonas Ådahl <jadahl src gnome org>]

commit 06dae3a8cc05f2dee34183bc045411d88633a00b
Author: Daniel van Vugt <daniel van vugt canonical com>
Date:   Wed Feb 5 15:38:05 2020 +0800

    wayland-pointer: Bail unconditionally if without native backend
    
    Using `-Dnative_backend=false` caused build failure due to a missing
    (implicit) definition of `META_IS_BACKEND_X11`. But if we define it
    properly then that just leaves some of the function's locals uninitialized
    and it will never work anyway. Just return unconditionally if there's no
    native backend to initialize the variables.
    
    Closes: https://gitlab.gnome.org/GNOME/mutter/issues/1025

 src/wayland/meta-wayland-pointer.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)
---
diff --git a/src/wayland/meta-wayland-pointer.c b/src/wayland/meta-wayland-pointer.c
index c643000c3..edf12459c 100644
--- a/src/wayland/meta-wayland-pointer.c
+++ b/src/wayland/meta-wayland-pointer.c
@@ -283,6 +283,7 @@ void
 meta_wayland_pointer_send_relative_motion (MetaWaylandPointer *pointer,
                                            const ClutterEvent *event)
 {
+#ifdef HAVE_NATIVE_BACKEND
   struct wl_resource *resource;
   double dx, dy;
   double dx_unaccel, dy_unaccel;
@@ -296,21 +297,14 @@ meta_wayland_pointer_send_relative_motion (MetaWaylandPointer *pointer,
   if (!pointer->focus_client)
     return;
 
-#ifdef HAVE_NATIVE_BACKEND
   if (!META_IS_BACKEND_NATIVE (backend) ||
       !meta_event_native_get_relative_motion (event,
                                               &dx, &dy,
                                               &dx_unaccel, &dy_unaccel))
     return;
-#else
-  if (META_IS_BACKEND_X11 (backend))
-    return;
-#endif
 
-#ifdef HAVE_NATIVE_BACKEND
   time_us = meta_event_native_get_time_usec (event);
   if (time_us == 0)
-#endif
     time_us = clutter_event_get_time (event) * 1000ULL;
   time_us_hi = (uint32_t) (time_us >> 32);
   time_us_lo = (uint32_t) time_us;
@@ -330,6 +324,7 @@ meta_wayland_pointer_send_relative_motion (MetaWaylandPointer *pointer,
                                                     dx_unaccelf,
                                                     dy_unaccelf);
     }
+#endif
 }
 
 void