[mutter] wayland: Use wl_display_add_socket_auto

[Jasper St. Pierre <jstpierre src gnome org>]

commit 2ce23072d35a9151de79f15d41ac4a77a77d4dc3
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Tue Aug 5 16:10:17 2014 -0400

    wayland: Use wl_display_add_socket_auto

 src/wayland/meta-wayland-private.h |    2 +-
 src/wayland/meta-wayland.c         |    4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/src/wayland/meta-wayland-private.h b/src/wayland/meta-wayland-private.h
index 9e35e1c..0edc725 100644
--- a/src/wayland/meta-wayland-private.h
+++ b/src/wayland/meta-wayland-private.h
@@ -70,7 +70,7 @@ typedef struct
 struct _MetaWaylandCompositor
 {
   struct wl_display *wayland_display;
-  char *display_name;
+  const char *display_name;
   ClutterActor *stage;
   GHashTable *outputs;
   struct wl_list frame_callbacks;
diff --git a/src/wayland/meta-wayland.c b/src/wayland/meta-wayland.c
index 1a4dacb..7e83bf3 100644
--- a/src/wayland/meta-wayland.c
+++ b/src/wayland/meta-wayland.c
@@ -417,8 +417,8 @@ meta_wayland_init (void)
   meta_wayland_seat_init (compositor);
 
   /* FIXME: find the first free name instead */
-  compositor->display_name = g_strdup ("wayland-0");
-  if (wl_display_add_socket (compositor->wayland_display, compositor->display_name))
+  compositor->display_name = wl_display_add_socket_auto (compositor->wayland_display);
+  if (compositor->display_name == NULL)
     g_error ("Failed to create socket");
 
   /* XXX: It's important that we only try and start xwayland after we