[mutter] check window has frame before flashing it

[Owen Taylor <otaylor src gnome org>]

commit 11e01ec0744617624b553263e529a52b703e2732
Author: alexisdm59 <alexisdm59 gmail com>
Date:   Sun Jan 17 13:41:59 2010 -0500

    check window has frame before flashing it
    
    https://bugzilla.gnome.org/show_bug.cgi?id=598231

 src/core/bell.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/core/bell.c b/src/core/bell.c
index cb0685b..2e5b8f1 100644
--- a/src/core/bell.c
+++ b/src/core/bell.c
@@ -235,11 +235,11 @@ bell_flash_frame (MetaDisplay *display,
   
   g_assert (xkb_ev->xkb_type == XkbBellNotify);
   window = meta_display_lookup_x_window (display, xkb_bell_event->window);
-  if (!window && (display->focus_window) && (display->focus_window->frame))
+  if (!window && (display->focus_window))
     {
       window = display->focus_window;
     }
-  if (window)
+  if (window && window->frame)
     {
       bell_flash_window_frame (window);
     }