'.max' returns 'nil' for empty array...
'.max' returns 'nil' for empty array...

Motejl/open-data-certificate,theodi/open-data-certificate,zoul/open-data-certificate,Motejl/open-data-certificate,ahmadassaf/open-data-certificate,zoul/open-data-certificate,theodi/open-data-certificate,istvan-antal/open-data-certificate,istvan-antal/open-data-certificate,zoul/open-data-certificate,ahmadassaf/open-data-certificate,ahmadassaf/open-data-certificate,ahmadassaf/open-data-certificate,istvan-antal/open-data-certificate,zoul/open-data-certificate,Motejl/open-data-certificate,Motejl/open-data-certificate,theodi/open-data-certificate,theodi/open-data-certificate