Can't add a new torrent while verifying an incomplete one

[lvella]

Somehow when upgrading to 2.30, one of my downloading torrents got corrupted, so I had to manually ask to verify local data. While verifying, I tried to add a new torrent (via web interface). Instead of initializing immediately, it went to the queue, waiting to be verified. Since the first torrent being verified was very big and my storage medium is very slow (USB 1.0 in an embedded system), I did not want to wait it to finish.

I think new torrents with no data is a common enough case, so transmission should check if there is some data of it before scheduling a data verify, instead doing it for every newly added torrent.

[jordan]

This is a duplicate of #4034