"null" drop category

[wodim]

https://tcubuntu.northeurope.cloudapp.azure.com/aowow/?npc=28234

"One or more errors occured, while generating this page.
E_NOTICE - Undefined offset: 0 @ /var/www/tcubuntu.northeurope.cloudapp.azure.com/html/aowow/pages/npc.php:625"

[Sarjuuk]

fixed in 2e9b503