[mutter] window: Update the stack after setting the transient_for field

[Jonas Ådahl <jadahl src gnome org>]

commit 213f0fa160f1d9407e46cc36816132043a9369dc
Author: Jonas Ådahl <jadahl gmail com>
Date:   Thu Sep 24 13:35:42 2015 +0800

    window: Update the stack after setting the transient_for field
    
    Don't update the stack until after setting the window->transient_for
    field. Updating before will cause the stack transient-for constraint to
    be missing until the next time constraints are applied.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=755606

 src/core/window.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/src/core/window.c b/src/core/window.c
index b21b6bb..25cc5b8 100644
--- a/src/core/window.c
+++ b/src/core/window.c
@@ -7417,14 +7417,14 @@ meta_window_set_transient_for (MetaWindow *window,
         }
     }
 
-  /* update stacking constraints */
-  if (!window->override_redirect)
-    meta_stack_update_transient (window->screen->stack, window);
-
   /* We know this won't create a reference cycle because we check for loops */
   g_clear_object (&window->transient_for);
   window->transient_for = parent ? g_object_ref (parent) : NULL;
 
+  /* update stacking constraints */
+  if (!window->override_redirect)
+    meta_stack_update_transient (window->screen->stack, window);
+
   /* possibly change its group. We treat being a window's transient as
    * equivalent to making it your group leader, to work around shortcomings
    * in programs such as xmms-- see #328211.