[klone] codec chain flush fix on zero-length input stream
[klone] codec chain flush fix on zero-length input stream

xunmengfeng/klone,larsthegeek/klone,koanlogic/klone,koanlogic/klone,larsthegeek/klone,koanlogic/klone,larsthegeek/klone,xunmengfeng/klone