sync: bugfix
sync: bugfix

don't except on trying to find out if event has been deleted on
sabredav/fruux.com

sithglan/khal,geier/khal,pimutils/khal,sdx23/khal,sheeprine/khal,dzoep/khal,sithglan/khal,hobarrera/khal,pdav/khal,sheeprine/khal