extensions CHANGE use the validate callback of extension plugin
The validate callback was not used so far. It is now used for validating
data nodes by extension instances placed in the nodes themselves or in
their types (compiled types, so not matter where the extension came
from, the node's type itself or a used typedef's type).
diff --git a/src/lyb.h b/src/lyb.h
index 30e89fd..e56457d 100644
--- a/src/lyb.h
+++ b/src/lyb.h
@@ -66,6 +66,7 @@
uint32_t path_len; /**< used bytes in the path buffer */
char path[LYD_PARSER_BUFSIZE]; /**< buffer for the generated path */
struct ly_set node_when; /**< set of nodes with "when" conditions */
+ struct ly_set node_exts; /**< set of nodes and extensions connected with a plugin providing own validation callback */
struct ly_set node_types; /**< set of nodes validated with LY_EINCOMPLETE result */
struct ly_set meta_types; /**< set of metadata validated with LY_EINCOMPLETE result */
struct lyd_node *op_node; /**< if an RPC/action/notification is being parsed, store the pointer to it */