data tree CHNAGE remove static assert because of OSX
#include "tree_data.h"
#include "plugins_types.h"
-#include <assert.h>
#include <stddef.h>
-static_assert(offsetof(struct lyd_node, flags) == offsetof(struct lyd_node_opaq, flags), "");
-
/**
* @brief Check whether a node to be deleted is the first top-level sibling.
*
