[mutter/wip/carlosg/xwayland-on-demand: 16/32] core: Do not synchronize stack with Xserver if there is no X11 Display



commit 672240d1052af85b81aec45fc4f5f1d5bf628876
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sun Dec 30 13:12:42 2018 +0100

    core: Do not synchronize stack with Xserver if there is no X11 Display
    
    We were assuming there is always a MetaX11Display, this step can simply be
    ignored if there not one.

 src/core/stack.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/src/core/stack.c b/src/core/stack.c
index 619d27a49..092834c25 100644
--- a/src/core/stack.c
+++ b/src/core/stack.c
@@ -1009,6 +1009,9 @@ stack_sync_to_xserver (MetaStack *stack)
   GList *tmp;
   GArray *hidden_stack_ids;
 
+  if (!stack->display->x11_display)
+    return;
+
   /* Bail out if frozen */
   if (stack->freeze_count > 0)
     return;


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