Check that object has a ban before we unbusy it.

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@4055 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/cache_center.c

@@ -573,6 +573,7 @@ cnt_fetch(struct sess *sp)
 	if (sp->obj->objhead != NULL) {
 		VRY_Create(sp);
 		EXP_Insert(sp->obj);
+		AN(sp->obj->ban);
 		HSH_Unbusy(sp);
 	}
 	sp->acct_req.fetch++;

bin/varnishd/cache_hash.c

@@ -593,6 +593,7 @@ HSH_Unbusy(const struct sess *sp)
 	CHECK_OBJ(oh, OBJHEAD_MAGIC);
 
 	AN(ObjIsBusy(o));
+	AN(o->ban);
 	assert(o->objcore->obj == o);
 	assert(o->refcnt > 0);
 	assert(oh->refcnt > 0);