[metacity] stack: ignore unmanaging windows

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 9b192a5c5ed1f35888dd6e88648ad44b4fa2da36
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Tue Feb 28 02:47:22 2017 +0200

    stack: ignore unmanaging windows

 src/core/stack.c |   14 +++++++++-----
 1 files changed, 9 insertions(+), 5 deletions(-)
---
diff --git a/src/core/stack.c b/src/core/stack.c
index f8532ed..d6561e1 100644
--- a/src/core/stack.c
+++ b/src/core/stack.c
@@ -1129,6 +1129,12 @@ stack_sync_to_server (MetaStack *stack)
 
       w = tmp->data;
 
+      if (w->unmanaging)
+        {
+          tmp = tmp->next;
+          continue;
+        }
+
       /* remember, stacked is in reverse order (bottom to top) */
       g_array_prepend_val (stacked, w->xwindow);
 
@@ -1146,11 +1152,6 @@ stack_sync_to_server (MetaStack *stack)
   meta_topic (META_DEBUG_STACK, "\n");
   meta_pop_no_msg_prefix ();
 
-  /* All windows should be in some stacking order */
-  if (stacked->len != stack->windows->len)
-    meta_bug ("%u windows stacked, %u windows exist in stack\n",
-              stacked->len, stack->windows->len);
-
   /* Sync to server */
 
   meta_topic (META_DEBUG_STACK, "Restacking %u windows\n",
@@ -1437,6 +1438,9 @@ get_default_focus_window (MetaStack     *stack,
       if (window->minimized)
         continue;
 
+      if (window->unmanaging)
+        continue;
+
       if (!(window->input || window->take_focus))
         continue;