Fix MTProxy broken since HTTP support

src/Client.Helpers.cs

@@ -288,11 +288,11 @@ async Task<InputFileBase> UploadFromUrl(string url)
 		/// <param name="to_peer">Destination peer</param>
 		/// <param name="top_msg_id">Destination <a href="https://corefork.telegram.org/api/forum#forum-topics">forum topic</a></param>
 		/// <returns>The resulting forwarded messages, as received by Telegram</returns>
-		public async Task<Message[]> ForwardMessagesAsync(InputPeer from_peer, int[] msg_ids, InputPeer to_peer, int? top_msg_id = null, bool drop_author = false, bool drop_media_captions = false)
+		public async Task<Message[]> ForwardMessagesAsync(InputPeer from_peer, int[] msg_ids, InputPeer to_peer, int top_msg_id = 0, bool drop_author = false, bool drop_media_captions = false)
 		{
 			var random_id = Helpers.RandomLong();
 			var random_ids = Enumerable.Range(0, msg_ids.Length).Select(i => random_id + i).ToArray();
-			var updates = await this.Messages_ForwardMessages(from_peer, msg_ids, random_ids, to_peer, top_msg_id, drop_author: drop_author, drop_media_captions: drop_media_captions);
+			var updates = await this.Messages_ForwardMessages(from_peer, msg_ids, random_ids, to_peer, top_msg_id == 0 ? null : top_msg_id, drop_author: drop_author, drop_media_captions: drop_media_captions);
 			var msgIds = new int[updates.UpdateList.OfType<UpdateMessageID>().Count()];
 			var result = new Message[msgIds.Length];
 			foreach (var update in updates.UpdateList)

src/Client.cs

@@ -884,7 +884,7 @@ private async Task DoConnectAsync(bool quickResume)
 				throw new Exception("Library was not compiled with OBFUSCATION symbol");
 #endif
 			}
-			if (_httpClient != null)
+			else if (_httpClient != null)
 				_reactorTask = Task.CompletedTask;
 			else
 			{