Fix AttributeError when post_sort_method is NULL#404

MalloyDelacroix merged 1 commit intoMalloyDelacroix:masterMalloyDelacroix/DownloaderForReddit:masterfrom

Jrjy3:fix/null-post-sort-methodJrjy3/DownloaderForReddit:fix/null-post-sort-methodCopy head branch name to clipboard