incorrect translation in Dekko

[Dan Chapman]

Hi all,

I've just had a report of a wrongly translated string [1] in Dekko. This 
was probably my fault as the translators comments weren't being picked 
up by gettext, so it was an easy mistake for someone to make.

Currently the UI is showing "aaaa" instead of the year (yyyy). It would 
be greatly appreciated if someone could take a look at this and update 
the translation.

Many Thanks

Dan Chapman

[1] 
https://translations.launchpad.net/dekko/0.5/+pots/dekko.dekkoproject/es/+translate?batch=10&show=all&search=aaaa