updated the check for emptiness of dvhsequence
updated the check for emptiness of dvhsequence

aditiiyer/CERR,cerr/CERR,aditiiyer/CERR,aditiiyer/CERR,cerr/CERR,aditiiyer/CERR,aditiiyer/CERR,cerr/CERR,cerr/CERR,cerr/CERR,aditiiyer/CERR,aditiiyer/CERR,cerr/CERR,cerr/CERR,cerr/CERR,aditiiyer/CERR,cerr/CERR