array_key_exists() error for taxonomy form

I got
warning: array_key_exists() expects parameter 2 to be array, null given in /var/www/clients/client1/web15/web/sites/all/modules/editview/theme/editview.theme.inc line 115/118

This happens when you have an editview with an 'all Terms' field, for every node(row) listed which has no taxonomy assigned.

(I know, it's not useful to list node types without taxonomy assigned. But it can happen sometimes.)