Don't fail if --fatal not provided
Don't fail if --fatal not provided

Fixes https://github.com/getpelican/pelican/issues/1891

ehashman/pelican,avaris/pelican,ingwinlu/pelican,douglaskastle/pelican,getpelican/pelican,lucasplus/pelican,lucasplus/pelican,catdog2/pelican,zackw/pelican,iKevinY/pelican,zackw/pelican,talha131/pelican,iKevinY/pelican,douglaskastle/pelican,lucasplus/pelican,zackw/pelican,farseerfc/pelican,Rogdham/pelican,catdog2/pelican,Scheirle/pelican,karlcow/pelican,ingwinlu/pelican,douglaskastle/pelican,Scheirle/pelican,ehashman/pelican,karlcow/pelican,farseerfc/pelican,karlcow/pelican,avaris/pelican,getpelican/pelican,Scheirle/pelican,catdog2/pelican,talha131/pelican,Rogdham/pelican,Rogdham/pelican,ehashman/pelican