fix slice initialization
fix slice initialization

jvinod/ost,libopenstorage/openstorage,libopenstorage/openstorage,ModelRocket/openstorage,kunalkushwaha/openstorage,pault84/openstorage,ModelRocket/openstorage,pault84/openstorage,pault84/openstorage,libopenstorage/openstorage,phoenix-io/openstorage