Fix a memoryleak relating to hash strings, found by: Arjan (noosius).

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@2614 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/cache_hash.c

@@ -383,6 +383,7 @@ HSH_Deref(struct object *o)
 	assert(VTAILQ_EMPTY(&oh->objects));
 	MTX_DESTROY(&oh->mtx);
 	VSL_stats->n_objecthead--;
+	free(oh->hash);
 	FREE_OBJ(oh);
 }