[mutter] window-actor: Skip frame-sync when the corresponding window is gone

[Florian Müllner <fmuellner src gnome org>]

commit 8d53ae894b7be75520f74e8afc7009b0360af156
Author: Florian Müllner <fmuellner gnome org>
Date:   Wed Sep 10 23:55:22 2014 +0200

    window-actor: Skip frame-sync when the corresponding window is gone
    
    https://bugzilla.gnome.org/show_bug.cgi?id=735927

 src/compositor/meta-window-actor.c |   16 +++++++++++++++-
 1 files changed, 15 insertions(+), 1 deletions(-)
---
diff --git a/src/compositor/meta-window-actor.c b/src/compositor/meta-window-actor.c
index 278f0c8..39864d6 100644
--- a/src/compositor/meta-window-actor.c
+++ b/src/compositor/meta-window-actor.c
@@ -927,7 +927,12 @@ meta_window_actor_queue_frame_drawn (MetaWindowActor *self,
                                      gboolean         no_delay_frame)
 {
   MetaWindowActorPrivate *priv = self->priv;
-  FrameData *frame = g_slice_new0 (FrameData);
+  FrameData *frame;
+
+  if (meta_window_actor_is_destroyed (self))
+    return;
+
+  frame = g_slice_new0 (FrameData);
 
   priv->needs_frame_drawn = TRUE;
 
@@ -1903,6 +1908,9 @@ meta_window_actor_pre_paint (MetaWindowActor *self)
   MetaWindowActorPrivate *priv = self->priv;
   GList *l;
 
+  if (meta_window_actor_is_destroyed (self))
+    return;
+
   meta_window_actor_handle_updates (self);
 
   for (l = priv->frames; l != NULL; l = l->next)
@@ -1952,6 +1960,9 @@ meta_window_actor_post_paint (MetaWindowActor *self)
 
   priv->repaint_scheduled = FALSE;
 
+  if (meta_window_actor_is_destroyed (self))
+    return;
+
  /* This window had damage, but wasn't actually redrawn because
   * it is obscured. So we should wait until timer expiration
   * before sending _NET_WM_FRAME_* messages.
@@ -2039,6 +2050,9 @@ meta_window_actor_frame_complete (MetaWindowActor *self,
   MetaWindowActorPrivate *priv = self->priv;
   GList *l;
 
+  if (meta_window_actor_is_destroyed (self))
+    return;
+
   for (l = priv->frames; l;)
     {
       GList *l_next = l->next;