parser yang CHANGE support extension in leaf, leaf-list, list statement

not supported in substatements
diff --git a/src/parser_yang.c b/src/parser_yang.c
index a05b4b1..e333c24 100644
--- a/src/parser_yang.c
+++ b/src/parser_yang.c
@@ -2100,6 +2100,9 @@
         break;
     case GROUPING_KEYWORD:
     case CONTAINER_KEYWORD:
+    case LEAF_KEYWORD:
+    case LEAF_LIST_KEYWORD:
+    case LIST_KEYWORD:
         ext = &((struct lys_node *)node)->ext;
         size = &((struct lys_node *)node)->ext_size;
         parent_type = LYEXT_PAR_NODE;