KuCoin: handle when total # sym is not a multiple of 100 in Trades websocket (#452)

Author: vslee

ExchangeSharp/API/Exchanges/KuCoin/ExchangeKuCoinAPI.cs

@@ -513,8 +513,9 @@ protected override async Task<IWebSocket> OnGetTradesWebSocketAsync(Func<KeyValu
 					int tunnelInt = 0;
 					while (marketSymbolsList.Count > 0)
 					{ // can only subscribe to 100 symbols per session (started w/ API 2.0)
-						var nextBatch = marketSymbolsList.GetRange(index: 0, count: 100);
-						marketSymbolsList.RemoveRange(index: 0, count: 100);
+						var batchSize = marketSymbolsList.Count > 100 ? 100 : marketSymbolsList.Count;
+						var nextBatch = marketSymbolsList.GetRange(index: 0, count: batchSize);
+						marketSymbolsList.RemoveRange(index: 0, count: batchSize);
 						// create a new tunnel
 						await _socket.SendMessageAsync(new
 						{