(trunk libT) #3934 "manual reannounce doesn't work if the initial announce failed...

(trunk libT) #3934 "manual reannounce doesn't work if the initial announce failed" -- fixed.

Use tor->isRunning, rather than tier->isRunning, when testing to see if a torrent can manual announce or not.  tor->isRunning means we're inbetween the user pressing "start" and "stop." tier->isRunning means we're inbetween successful "started" and "stopped" announcements. (This is deliberately out-of-sync from tor->isRunning because it can take awhile to for tracker announces to finish.)

Under the old code (using tier->isRunning), it was impossible to manually reannounce unless there had been a successful event=started announce first. It was also possible to manually announce after the "stop" button had been pressed if the "event=stopped" announcement hadn't finished yet.