[mutter/wip/carlosg/unthrottled-wayland: 967/978] clutter: Add missing G_GNUC_FALLTHROUGH

[Carlos Garnacho <carlosg src gnome org>]

commit d6b9572c17a0e151896a9cb352919052d3de4942
Author: Carlos Garnacho <carlosg gnome org>
Date:   Fri Jun 4 16:37:52 2021 +0200

    clutter: Add missing G_GNUC_FALLTHROUGH
    
    We do actually fall through here, so let it known that it's intentional.

 clutter/clutter/clutter-main.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/clutter/clutter/clutter-main.c b/clutter/clutter/clutter-main.c
index 27ae446f88..fa0dda69a7 100644
--- a/clutter/clutter/clutter-main.c
+++ b/clutter/clutter/clutter-main.c
@@ -1632,6 +1632,8 @@ _clutter_process_event_details (ClutterActor        *stage,
                                                              event->type == CLUTTER_BUTTON_PRESS);
               }
           }
+
+        G_GNUC_FALLTHROUGH;
       case CLUTTER_SCROLL:
       case CLUTTER_TOUCHPAD_PINCH:
       case CLUTTER_TOUCHPAD_SWIPE: