[gtk+] gdk: fix a format string warning

[Timm Bäder <baedert src gnome org>]

commit cd6408b47a934b1192afad11c24811bfbe1a2510
Author: Timm Bäder <mail baedert org>
Date:   Sun Feb 4 15:48:47 2018 +0100

    gdk: fix a format string warning

 gdk/wayland/gdkdevice-wayland.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gdk/wayland/gdkdevice-wayland.c b/gdk/wayland/gdkdevice-wayland.c
index a17d531..0946c32 100644
--- a/gdk/wayland/gdkdevice-wayland.c
+++ b/gdk/wayland/gdkdevice-wayland.c
@@ -3772,7 +3772,7 @@ tablet_pad_ring_handle_angle (void                          *data,
   GdkWaylandSeat *seat = GDK_WAYLAND_SEAT (pad->seat);
 
   GDK_DISPLAY_NOTE (seat->display, EVENTS,
-            g_message ("tablet pad ring handle angle, %s ring = %p angle = %f",
+            g_message ("tablet pad ring handle angle, ring = %p angle = %f",
                        wp_tablet_pad_ring, wl_fixed_to_double (angle)));
 
   group->axis_tmp_info.value = wl_fixed_to_double (angle);