[mutter] Trap xerrors in mutter_window_pre_paint

[Adel Gadllah <agadllah src gnome org>]

commit 2a54baf60ec51c2d7a120b7c8f5de40711464618
Author: Adel Gadllah <adel gadllah gmail com>
Date:   Mon Aug 23 22:26:02 2010 +0200

    Trap xerrors in mutter_window_pre_paint
    
    XDamageSubstract can create a BadDamage
    (when the window goes away before XDamageSubstract is called)
    and thus resulting into a crash.
    
    Fix it by protecting the call with an error trap.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=623235

 src/compositor/mutter-window.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/compositor/mutter-window.c b/src/compositor/mutter-window.c
index 145ca4d..4de2daa 100644
--- a/src/compositor/mutter-window.c
+++ b/src/compositor/mutter-window.c
@@ -1772,7 +1772,9 @@ mutter_window_pre_paint (MutterWindow *self)
 
   if (priv->received_damage)
     {
+      meta_error_trap_push (display);
       XDamageSubtract (xdisplay, priv->damage, None, None);
+      meta_error_trap_pop (display, FALSE);
       priv->received_damage = FALSE;
     }