Fixed possible division by 0

src/bittorrent.cpp

@@ -84,11 +84,13 @@ void bittorrent::updateETAs(){
       }else{
         torrent_status torrentStatus = h.status();
         torrent_info ti = h.get_torrent_info();
+        if(torrentStatus.download_payload_rate != 0){
           listEtas << (long)((ti.total_size()-torrentStatus.total_done)/(double)torrentStatus.download_payload_rate);
           ETAstats[hash] = listEtas;
         }
       }
     }
+  }
 }
 
 long bittorrent::getETA(QString hash) const{