[clutter/clutter-1.16] stage: Ensure that we don't pick during destruction

[Emmanuele Bassi <ebassi src gnome org>]

commit e1fe999db05b857b13c408187edcf440fe4e2d51
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Sun Jun 9 17:38:19 2013 +0100

    stage: Ensure that we don't pick during destruction
    
    When destroying a ClutterStage we should just skip picking operations,
    to avoid calling into a state that is being torn down.

 clutter/clutter-stage.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/clutter/clutter-stage.c b/clutter/clutter-stage.c
index 39514f5..e2698f7 100644
--- a/clutter/clutter-stage.c
+++ b/clutter/clutter-stage.c
@@ -633,6 +633,9 @@ _clutter_stage_do_paint (ClutterStage                *stage,
   float clip_poly[8];
   cairo_rectangle_int_t geom;
 
+  if (priv->impl == NULL)
+    return;
+
   _clutter_stage_window_get_geometry (priv->impl, &geom);
 
   if (clip)
@@ -1463,9 +1466,15 @@ _clutter_stage_do_pick (ClutterStage   *stage,
 
   priv = stage->priv;
 
+  if (CLUTTER_ACTOR_IN_DESTRUCTION (stage))
+    return CLUTTER_ACTOR (stage);
+
   if (G_UNLIKELY (clutter_pick_debug_flags & CLUTTER_DEBUG_NOP_PICKING))
     return CLUTTER_ACTOR (stage);
 
+  if (G_UNLIKELY (priv->impl == NULL))
+    return CLUTTER_ACTOR (stage);
+
 #ifdef CLUTTER_ENABLE_PROFILE
   if (clutter_profile_flags & CLUTTER_PROFILE_PICKING_ONLY)
     _clutter_profile_resume ();