[glib] GGtkNotificationBackend: Use correct path for GetNameOwner call

[Simon McVittie <smcv src gnome org>]

commit 34045e66a69636933b3e2c5c84ecab4463ff58d4
Author: Simon McVittie <smcv collabora com>
Date:   Fri Jun 9 12:41:54 2017 +0100

    GGtkNotificationBackend: Use correct path for GetNameOwner call
    
    For historical reasons, the reference dbus-daemon responds to most
    method calls on all object paths. However, the canonical path
    of the object implementing the o.fd.DBus interface is
    /org/freedesktop/DBus, and in some environments (notably AppArmor
    with the <abstractions/dbus-session-strict> abstraction) only this
    path is allowed.
    
    https://bugs.freedesktop.org/show_bug.cgi?id=101256 officially
    deprecates all other object paths, and when adding new APIs we will
    only make them available on the canonical object path.
    
    Signed-off-by: Simon McVittie <smcv collabora com>
    Reviewed-by: Emmanuele Bassi <ebassi gnome org>
    Bug: https://bugzilla.gnome.org/show_bug.cgi?id=783593

 gio/ggtknotificationbackend.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/gio/ggtknotificationbackend.c b/gio/ggtknotificationbackend.c
index 37068dc..8d6eab2 100644
--- a/gio/ggtknotificationbackend.c
+++ b/gio/ggtknotificationbackend.c
@@ -58,7 +58,8 @@ g_gtk_notification_backend_is_supported (void)
   if (session_bus == NULL)
     return FALSE;
 
-  reply = g_dbus_connection_call_sync (session_bus, "org.freedesktop.DBus", "/", "org.freedesktop.DBus",
+  reply = g_dbus_connection_call_sync (session_bus, "org.freedesktop.DBus", "/org/freedesktop/DBus",
+                                       "org.freedesktop.DBus",
                                        "GetNameOwner", g_variant_new ("(s)", "org.gtk.Notifications"),
                                        G_VARIANT_TYPE ("(s)"), G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL);