fixed bug with fixture generation

internal/db/fixture.go

@@ -269,7 +269,7 @@ func playOtherTeams(team *Team, teams []*Team, round int) []*versus {
 	matchups := make([]*versus, len(teams))
 	for i, opponent := range teams {
 		versus := &versus{}
-		if i%2+round%2 == 0 {
+		if (i+round)%2 == 0 {
 			versus.homeTeam = team
 			versus.awayTeam = opponent
 		} else {