[gtk+] x11: Set override_redirect on input-only windows

[Benjamin Otte <otte src gnome org>]

commit b7619a2603c62c955054fd8623ff61c4c1a9974a
Author: Benjamin Otte <otte redhat com>
Date:   Sun Nov 6 15:43:06 2016 +0100

    x11: Set override_redirect on input-only windows
    
    b9955cfff1a2290c7826565049c934d237e9028f broke this.

 gdk/x11/gdkwindow-x11.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/gdk/x11/gdkwindow-x11.c b/gdk/x11/gdkwindow-x11.c
index 279c233..f003dc3 100644
--- a/gdk/x11/gdkwindow-x11.c
+++ b/gdk/x11/gdkwindow-x11.c
@@ -977,6 +977,14 @@ _gdk_x11_display_create_window_impl (GdkDisplay    *display,
     {
       class = InputOnly;
 
+      if (window->window_type == GDK_WINDOW_TEMP)
+        {
+          xattributes.override_redirect = True;
+          xattributes_mask |= CWOverrideRedirect;
+
+          impl->override_redirect = TRUE;
+        }
+
       depth = 0;
     }