#341 0000 dates are displayed as 0000 rather than as "unknown"

[Ahasuerus]

The Publication Listing page displays 0000-00-00 dates as "0000" rather than as "unknown" under some circumstances. For example, http://www.isfdb.org/cgi-bin/pl.cgi?411520 displays:

Die Rache • shortfiction by Edi Schwarz (trans. of Отмъщение 0000)

rather than:

Die Rache • shortfiction by Edi Schwarz (trans. of Отмъщение unknown)

[Ahasuerus]

Fixed in:

common/library 1.25
biblio/pl.py 1.60
biblio/pubseries.py 1.13

Installed in r2013-95. Closing the Bug.

[Ahasuerus]

Closing.