[mutter] window: Include window itself in transient loop check

[Florian Müllner <fmuellner src gnome org>]

commit 5f49bda5917f4a0a0bc966d83fc49e41ac0ca772
Author: Florian Müllner <fmuellner gnome org>
Date:   Wed Jun 7 14:12:39 2017 +0200

    window: Include window itself in transient loop check
    
    While it doesn't make sense to set a window as transient to
    itself, our existing check whether making a window transient
    doesn't cover it, so it's still possible to create an infinite
    loop.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=783502

 src/core/window.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/core/window.c b/src/core/window.c
index 36ea96f..a6ec04f 100644
--- a/src/core/window.c
+++ b/src/core/window.c
@@ -7508,7 +7508,7 @@ check_transient_for_loop (MetaWindow *window,
 {
   while (parent)
     {
-      if (parent->transient_for == window)
+      if (parent == window)
           return TRUE;
       parent = parent->transient_for;
     }