[gtk+] gtkdnd: Unbreak non-wayland builds

[Carlos Garnacho <carlosg src gnome org>]

commit 770feff302b8f834637374abb4b054734b2e93ac
Author: Carlos Garnacho <carlosg gnome org>
Date:   Fri Nov 20 13:29:34 2015 +0100

    gtkdnd: Unbreak non-wayland builds
    
    missing #ifdef...

 gtk/gtkdnd.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkdnd.c b/gtk/gtkdnd.c
index d495ca9..ef49b80 100644
--- a/gtk/gtkdnd.c
+++ b/gtk/gtkdnd.c
@@ -787,8 +787,10 @@ gtk_drag_can_use_rgba_cursor (GdkDisplay *display,
 {
   guint max_width, max_height;
 
+#ifdef GDK_WINDOWING_WAYLAND
   if (GDK_IS_WAYLAND_DISPLAY (display))
     return FALSE;
+#endif
 
   if (!gdk_display_supports_cursor_color (display))
     return FALSE;