util: Pass flags to map iterators

On the client side we're going to need to know if an object from the
map is a zombie before we attempt to dereference it, so we need to
pass this to the iterator.

Reviewed-by: Daniel Stone <daniels@collabora.com>
Signed-off-by: Derek Foreman <derekf@osg.samsung.com>

src/wayland-private.h

@@ -80,7 +80,8 @@ struct wl_map {
 };
 
 typedef enum wl_iterator_result (*wl_iterator_func_t)(void *element,
-						      void *data);
+						      void *data,
+						      uint32_t flags);
 
 void
 wl_map_init(struct wl_map *map, uint32_t side);