[hybride] fix bug whenthere is no end date
[hybride] fix bug whenthere is no end date

nojhan/weboob-devel,RouxRC/weboob,sputnick-dev/weboob,RouxRC/weboob,sputnick-dev/weboob,nojhan/weboob-devel,willprice/weboob,willprice/weboob,willprice/weboob,RouxRC/weboob,sputnick-dev/weboob,nojhan/weboob-devel