Fix public/private when joining a game

src/Impostor.Server/Net/Messages/Message10AlterGame.cs

@@ -4,7 +4,7 @@ namespace Impostor.Server.Net.Messages
 {
     internal static class Message10AlterGame
     {
-        public static void Serialize(IMessageWriter writer, bool clear, int gameCode)
+        public static void Serialize(IMessageWriter writer, bool clear, int gameCode, bool isPublic)
         {
             if (clear)
             {
@@ -13,13 +13,15 @@ public static void Serialize(IMessageWriter writer, bool clear, int gameCode)
 
             writer.StartMessage(MessageFlags.HostGame);
             writer.Write(gameCode);
+            writer.Write((byte)AlterGameTags.ChangePrivacy);
+            writer.Write(isPublic);
             writer.EndMessage();
         }
 
-        public static void Deserialize(IMessageReader reader, out AlterGameTags gameTag, out bool value)
+        public static void Deserialize(IMessageReader reader, out AlterGameTags gameTag, out bool isPublic)
         {
             gameTag = (AlterGameTags) reader.ReadByte();
-            value = reader.ReadBoolean();
+            isPublic = reader.ReadBoolean();
         }
     }
 }

src/Impostor.Server/Net/State/Game.Incoming.cs

@@ -152,7 +152,7 @@ private async ValueTask HandleJoinGameNew(IClientPlayer sender, bool isNew)
             using (var message = CreateMessage(MessageType.Reliable))
             {
                 WriteJoinedGameMessage(message, false, sender);
-                WriteAlterGameMessage(message, false);
+                WriteAlterGameMessage(message, false, IsPublic);
 
                 sender.Limbo = LimboStates.NotLimbo;
                 await message.SendToAsync(sender);

src/Impostor.Server/Net/State/Game.Outgoing.cs

@@ -21,9 +21,9 @@ private void WriteJoinedGameMessage(IMessageWriter message, bool clear, IClientP
             Message07JoinedGame.Serialize(message, clear, Code, player.Client.Id, HostId, playerIds);
         }
 
-        private void WriteAlterGameMessage(IMessageWriter message, bool clear)
+        private void WriteAlterGameMessage(IMessageWriter message, bool clear, bool isPublic)
         {
-            Message10AlterGame.Serialize(message, clear, Code);
+            Message10AlterGame.Serialize(message, clear, Code, isPublic);
         }
 
         private void WriteKickPlayerMessage(IMessageWriter message, bool clear, int playerId, bool isBan)

src/Impostor.Server/Net/State/Game.State.cs

@@ -94,7 +94,7 @@ private async ValueTask CheckLimboPlayers()
             foreach (var (_, player) in _players.Where(x => x.Value.Limbo == LimboStates.WaitingForHost))
             {
                 WriteJoinedGameMessage(message, true, player);
-                WriteAlterGameMessage(message, false);
+                WriteAlterGameMessage(message, false, IsPublic);
 
                 player.Limbo = LimboStates.NotLimbo;
                 await message.SendToAsync(player.Client);