Fix ratio calculation for purely seeded torrents

src/qtlibtorrent/qbtsession.cpp

@@ -1587,14 +1587,20 @@ qreal QBtSession::getRealRatio(const QString &hash) const{
   if(!h.is_valid()) {
     return 0.;
   }
-  const libtorrent::size_type all_time_download = h.all_time_download();
+
-  const libtorrent::size_type all_time_upload = h.all_time_upload();
+  libtorrent::size_type all_time_upload = h.all_time_upload();
+  libtorrent::size_type all_time_download = h.all_time_download();
+  if (all_time_download == 0 && h.is_seed()) {
+    // Purely seeded torrent
+    all_time_download = h.total_done();
+  }
 
   if(all_time_download == 0) {
     if(all_time_upload == 0)
       return 0;
     return MAX_RATIO+1;
   }
+
   qreal ratio = all_time_upload / (float) all_time_download;
   Q_ASSERT(ratio >= 0.);
   if(ratio > MAX_RATIO)