yin parser CHANGE add support for revision element
diff --git a/src/tree_schema_free.c b/src/tree_schema_free.c
index 8895385..8ad404f 100644
--- a/src/tree_schema_free.c
+++ b/src/tree_schema_free.c
@@ -76,7 +76,7 @@
     FREE_ARRAY(ctx, include->exts, lysp_ext_instance_free);
 }
 
-static void
+void
 lysp_revision_free(struct ly_ctx *ctx, struct lysp_revision *rev)
 {
     FREE_STRING(ctx, rev->dsc);