Fix euare-userdel -p error when used without -r
Fix euare-userdel -p error when used without -r

nagyistoce/euca2ools,vasiliykochergin/euca2ools,vasiliykochergin/euca2ools,jhajek/euca2ools,jhajek/euca2ools,gholms/euca2ools,nagyistoce/euca2ools,gholms/euca2ools