fix: Show only validated torrent file

If unable to decode a torrent file then there is no need to show it.
There is already a popup that this torrent can not be decoded.

Author: GerryFerdinandus

source/code/main.pas

@@ -1000,7 +1000,10 @@ function TFormTrackerModify.DecodeTorrentFile(const FileName: UTF8String): boole
   //Called when user add torrent files
   //False if something is wrong with decoding torrent.
   Result := FDecodePresentTorrent.DecodeTorrent(FileName);
-  ViewUpdateOneTorrentFileDecoded;
+  if Result then
+  begin
+    ViewUpdateOneTorrentFileDecoded;
+  end;
 end;
 
 procedure TFormTrackerModify.UpdateTorrentTrackerList;