[mutter] window: Do not try to focus O-R windows in focus-follow-mouse

[Olivier Fourdan <ofourdan src gnome org>]

commit 492854e14d474aec2e5cac02eb314c66c51f0655
Author: Olivier Fourdan <ofourdan redhat com>
Date:   Fri Jun 24 11:14:39 2016 +0200

    window: Do not try to focus O-R windows in focus-follow-mouse
    
    Doing so would raise a critical warning.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=767997

 src/core/window.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/core/window.c b/src/core/window.c
index 4dff32b..7395149 100644
--- a/src/core/window.c
+++ b/src/core/window.c
@@ -7502,6 +7502,9 @@ mouse_mode_focus (MetaWindow  *window,
 {
   MetaDisplay *display = window->display;
 
+  if (window->override_redirect)
+    return;
+
   if (window->type != META_WINDOW_DESKTOP)
     {
       meta_topic (META_DEBUG_FOCUS,