[twitter] fix bug in date parsing
[twitter] fix bug in date parsing

laurent-george/weboob,nojhan/weboob-devel,willprice/weboob,willprice/weboob,sputnick-dev/weboob,frankrousseau/weboob,sputnick-dev/weboob,laurent-george/weboob,sputnick-dev/weboob,nojhan/weboob-devel,RouxRC/weboob,Konubinix/weboob,RouxRC/weboob,nojhan/weboob-devel,RouxRC/weboob,frankrousseau/weboob,frankrousseau/weboob,Konubinix/weboob,willprice/weboob,Konubinix/weboob,laurent-george/weboob