[mutter/gnome-3-38] window/wayland: Warn when attempted to resend uninitialized state

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

commit 29776c99a85c071c48336e04b6e8e7191b2bc3b5
Author: Jonas Ådahl <jadahl gmail com>
Date:   Thu Nov 12 14:40:06 2020 +0100

    window/wayland: Warn when attempted to resend uninitialized state
    
    This happens due to Qt doing wierd things, committing incomplete and
    incorrect state.
    
    https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1559

 src/wayland/meta-window-wayland.c | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/src/wayland/meta-window-wayland.c b/src/wayland/meta-window-wayland.c
index b4329d452a..4ddecb4327 100644
--- a/src/wayland/meta-window-wayland.c
+++ b/src/wayland/meta-window-wayland.c
@@ -53,6 +53,7 @@ struct _MetaWindowWayland
   GList *pending_configurations;
   gboolean has_pending_state_change;
 
+  gboolean has_last_sent_configuration;
   int last_sent_x;
   int last_sent_y;
   int last_sent_width;
@@ -188,6 +189,10 @@ surface_state_changed (MetaWindow *window)
   if (window->unmanaging)
     return;
 
+  g_return_if_fail (wl_window->has_last_sent_configuration);
+  if (!wl_window->has_last_sent_configuration)
+    return;
+
   configuration =
     meta_wayland_window_configuration_new (wl_window->last_sent_x,
                                            wl_window->last_sent_y,
@@ -401,6 +406,7 @@ meta_window_wayland_move_resize_internal (MetaWindow                *window,
         }
     }
 
+  wl_window->has_last_sent_configuration = TRUE;
   wl_window->last_sent_x = configured_x;
   wl_window->last_sent_y = configured_y;
   wl_window->last_sent_width = configured_width;