fix potential div by zero error in tqdm
fix potential div by zero error in tqdm

Miserlou/Zappa,longzhi/Zappa,scoates/Zappa,mathom/Zappa,michi88/Zappa,longzhi/Zappa,anush0247/Zappa,michi88/Zappa,pjz/Zappa,scoates/Zappa,mathom/Zappa,Miserlou/Zappa,parroyo/Zappa,parroyo/Zappa,anush0247/Zappa,pjz/Zappa