[mutter] window/wayland: Plug window configuration leak

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 51733ca4996f128b2701258411f0cc5cf00830a4
Author: Sebastian Keller <skeller gnome org>
Date:   Fri Jan 24 14:00:33 2020 +0100

    window/wayland: Plug window configuration leak
    
    The acked configuration is removed from the pending configuration list
    by acquire_acked_configuration(), but finish_move_resize() does not free
    the data after applying the configuration.
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/1020

 src/wayland/meta-window-wayland.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/wayland/meta-window-wayland.c b/src/wayland/meta-window-wayland.c
index 5a73de4c4..7c8bcff42 100644
--- a/src/wayland/meta-window-wayland.c
+++ b/src/wayland/meta-window-wayland.c
@@ -864,6 +864,8 @@ meta_window_wayland_finish_move_resize (MetaWindow              *window,
 
   gravity = meta_resize_gravity_from_grab_op (window->display->grab_op);
   meta_window_move_resize_internal (window, flags, gravity, rect);
+
+  g_clear_pointer (&acked_configuration, meta_wayland_window_configuration_free);
 }
 
 void