dont marshal uninitialized players

src/server/game.go

@@ -8,9 +8,11 @@ import (
 	"strings"
 )
 
+type Players [16]Player
+
 type Game struct {
 	Pot     Currency
-	Players [16]Player
+	Players Players
 }
 
 type Player struct {
@@ -32,6 +34,12 @@ func (game Game) GetPlayers() []Player {
 	return players
 }
 
+func (players Players) MarshalJSON() ([]byte, error) {
+	game := Game{Players: players}
+	subplayers := game.GetPlayers()
+	return json.Marshal(subplayers)
+}
+
 func (p Player) Empty() bool {
 	return p == (Player{})
 }