Add an 'unwrap' VOL callback, so that connectors can unwrap an underlying

object without closing it.  (Especially needed for pass-through connectors)

1 files changed, 1 insertions, 0 deletions

diff --git a/test/vol.c b/test/vol.c
index e267084..3f6afaa 100644
--- a/test/vol.c
+++ b/test/vol.c
@@ -61,6 +61,7 @@ static const H5VL_class_t fake_vol_g = {
         NULL,                                       /* get_object   */
         NULL,                                       /* get_wrap_ctx */
         NULL,                                       /* wrap_object  */
+        NULL,                                       /* unwrap_object */
         NULL,                                       /* free_wrap_ctx */
     },
     {   /* attribute_cls */