Fixed crash that happens if no dbpath is supplied and no versions are supplied to list
Fixed crash that happens if no dbpath is supplied and no versions are supplied to list

gerco/duplicati,gerco/duplicati,AndersGron/duplicati,a1ezzz/duplicati,klammbueddel/duplicati,duplicati/duplicati,agrajaghh/duplicati,sitofabi/duplicati,AndersGron/duplicati,agrajaghh/duplicati,mnaiman/duplicati,agrajaghh/duplicati,mnaiman/duplicati,gerco/duplicati,duplicati/duplicati,AndersGron/duplicati,gerco/duplicati,mnaiman/duplicati,klammbueddel/duplicati,AndersGron/duplicati,a1ezzz/duplicati,klammbueddel/duplicati,gerco/duplicati,mnaiman/duplicati,duplicati/duplicati,sitofabi/duplicati,sitofabi/duplicati,agrajaghh/duplicati,klammbueddel/duplicati,sitofabi/duplicati,AndersGron/duplicati,duplicati/duplicati,a1ezzz/duplicati,a1ezzz/duplicati,agrajaghh/duplicati,klammbueddel/duplicati,sitofabi/duplicati,mnaiman/duplicati,a1ezzz/duplicati,duplicati/duplicati