[mutter/wip/carlosg/xwayland-on-demand: 7/15] wayland: Disconnect signal when the display closes

[Carlos Garnacho <carlosg src gnome org>]

commit b8fd6fbe72ce04b0bab7f74eef765ab686652cf0
Author: Carlos Garnacho <carlosg gnome org>
Date:   Fri May 24 20:57:16 2019 +0200

    wayland: Disconnect signal when the display closes
    
    It would be potentially left dangling if the display were closed, and
    reconnected again when restarting the server.
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/709

 src/wayland/meta-xwayland.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/src/wayland/meta-xwayland.c b/src/wayland/meta-xwayland.c
index 04d2df865..aba16413a 100644
--- a/src/wayland/meta-xwayland.c
+++ b/src/wayland/meta-xwayland.c
@@ -638,6 +638,9 @@ static void
 on_x11_display_closing (MetaDisplay *display)
 {
   meta_xwayland_shutdown_dnd ();
+  g_signal_handlers_disconnect_by_func (display,
+                                        on_x11_display_closing,
+                                        NULL);
 }
 
 /* To be called right after connecting */