server: Infrastructure for having a thread own the desktop window.
diff --git a/server/user.h b/server/user.h
index 1ac5ac0..7a64a4d 100644
--- a/server/user.h
+++ b/server/user.h
@@ -140,6 +140,7 @@
extern struct window_class *grab_class( struct process *process, atom_t atom,
void *instance, int *extra_bytes );
extern void release_class( struct window_class *class );
+extern int is_desktop_class( struct window_class *class );
extern atom_t get_class_atom( struct window_class *class );
extern void *get_class_client_ptr( struct window_class *class );