Release the esi_data storage when we release the object storage

it refers to.

bin/varnishd/cache_hash.c

@@ -691,10 +691,6 @@ HSH_Deref(struct worker *w, struct objcore *oc, struct object **oo)
 		DSL(0x40, SLT_Debug, 0, "Object %u workspace min free %u",
 		    o->xid, WS_Free(o->ws_o));
 
-		if (o->esidata != NULL) {
-			STV_free(o->esidata);
-			o->esidata = NULL;
-		}
 		if (oc != NULL)
 			oc_freeobj(oc);
 		w->stats.n_object--;

bin/varnishd/stevedore.c

@@ -301,6 +301,10 @@ STV_Freestore(struct object *o)
 {
 	struct storage *st, *stn;
 
+	if (o->esidata != NULL) {
+		STV_free(o->esidata);
+		o->esidata = NULL;
+	}
 	VTAILQ_FOREACH_SAFE(st, &o->store, list, stn) {
 		CHECK_OBJ_NOTNULL(st, STORAGE_MAGIC);
 		VTAILQ_REMOVE(&o->store, st, list);