Prevent errors on PirateBay plugin when scanning ads

[mfonville]

Motivation for changes:

Currently the Piratebay plugin gives errors when scanning their site, because of advertisements that are also marked as class="detLink". This change detects if the ULed user was piratebay, which indicates that it is an advertisement.

DEBUG    utils.requests Series-Trakt    GETing URL ... with args () and kwargs {'allow_redirects': True, 'timeout': 30}
DEBUG    plugin        Series-Trakt    decorator caught ValueError. handled traceback:
Traceback (most recent call last):
  File "flexget/plugin.py", line 119, in wrapped_func
    return func(*args, **kwargs)
  File "flexget/components/sites/sites/piratebay.py", line 164, in search
    entry['torrent_seeds'] = int(tds[-2].contents[0])
ERROR    discover      Series-Trakt    Error searching with piratebay: invalid literal for int() with base 10: '\n\t\t\t\t'

[mfonville]

@paranoidi is this ready for you to merge?

[paranoidi]

Sure, thanks for contributions!