[gtk+] clipboard: Fix compiler warning

[Benjamin Otte <otte src gnome org>]

commit cb1ac0c056dfc5b84d84c049f48d0b55cb019a8b
Author: Benjamin Otte <otte redhat com>
Date:   Mon Jul 7 19:42:59 2014 +0200

    clipboard: Fix compiler warning
    
    Cast the type.

 gtk/gtkclipboard-wayland.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkclipboard-wayland.c b/gtk/gtkclipboard-wayland.c
index 9e72802..ccd3cf7 100644
--- a/gtk/gtkclipboard-wayland.c
+++ b/gtk/gtkclipboard-wayland.c
@@ -295,7 +295,7 @@ gtk_clipboard_wayland_request_contents (GtkClipboard            *gtkclipboard,
 
       n_atoms = gdk_wayland_device_get_selection_type_atoms (device, &atoms);
       selection_data.length = n_atoms;
-      selection_data.data = atoms;
+      selection_data.data = (guchar *) atoms;
 
       callback (gtkclipboard, &selection_data, user_data);
       return;