[mutter] clutter-backend-x11: Don't push keymap events to clutter

[Carlos Garnacho <carlosg src gnome org>]

commit 446bd04b6c5c63b71cd90b8664e5442be43bfaaa
Author: Marco Trevisan (Treviño) <mail 3v1n0 net>
Date:   Sat Aug 31 17:57:32 2019 +0200

    clutter-backend-x11: Don't push keymap events to clutter
    
    Xkb events should be handled by clutter backend but they are not translated
    into an actual clutter event. However we're now handling them and also trying
    to push an empty event to clutter queue, causing a critical error.
    
    So in such case, just handle the native event but don't push the non-populated
    clutter-event to the queue.
    
    Fixes https://gitlab.gnome.org/GNOME/mutter/issues/750
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/764

 src/backends/x11/meta-clutter-backend-x11.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/backends/x11/meta-clutter-backend-x11.c b/src/backends/x11/meta-clutter-backend-x11.c
index 8d4b64b03..b6334de8b 100644
--- a/src/backends/x11/meta-clutter-backend-x11.c
+++ b/src/backends/x11/meta-clutter-backend-x11.c
@@ -129,7 +129,7 @@ meta_clutter_backend_x11_translate_event (ClutterBackend *backend,
     return TRUE;
 
   if (meta_keymap_x11_handle_event (backend_x11->keymap, native))
-    return TRUE;
+    return FALSE;
 
   stage_x11 = META_STAGE_X11 (clutter_backend_get_stage_window (backend));
   if (meta_stage_x11_translate_event (stage_x11, native, event))