[fix] schedule generation will not throw error if there are no teams
[fix] schedule generation will not throw error if there are no teams

rdonnelly/ultimate-league-app,rdonnelly/ultimate-league-app,a2ultimate/ultimate-league-app,a2ultimate/ultimate-league-app,rdonnelly/ultimate-league-app,a2ultimate/ultimate-league-app,rdonnelly/ultimate-league-app,a2ultimate/ultimate-league-app