Try to fix no more messages sent after exception. (#233)

Author: FEsteven

Assets/Colyseus/Runtime/WebSocket/WebSocket.cs

@@ -496,12 +496,12 @@ private async Task SendMessage(List<ArraySegment<byte>> queue, WebSocketMessageT
                 finally
                 {
                     Monitor.Exit(m_Socket);
-                }
 
-                // Note that we've finished sending.
-                lock (OutgoingMessageLock)
-                {
-                    isSending = false;
+					// Note that we've finished sending.
+					lock (OutgoingMessageLock)
+					{
+						isSending = false;
+					}
                 }
 
                 // Handle any queued messages.