-int ast_nodesearch(searchASTExpr *tree, replyFunc reply, void *sender, wallFunc wall, NodeDisplayFunc display, HeaderFunc header, void *headerarg, int limit);
+int ast_nodesearch(searchASTExpr *tree, replyFunc reply, void *sender, wallFunc wall, NodeDisplayFunc display, HeaderFunc header, void *headerarg, int limit, patricia_node_t *target);