[Modify] Polish it

websocket-sharp/Net/HttpListenerRequest.cs

@@ -583,19 +583,23 @@ namespace WebSocketSharp.Net
     private void finishInitialization10 ()
     {
       var transferEnc = _headers["Transfer-Encoding"];
+
       if (transferEnc != null) {
         _context.ErrorMessage = "Invalid Transfer-Encoding header";
+
         return;
       }
 
       if (_httpMethod == "POST") {
         if (_contentLength == -1) {
           _context.ErrorMessage = "Content-Length header required";
+
           return;
         }
 
         if (_contentLength == 0) {
           _context.ErrorMessage = "Invalid Content-Length header";
+
           return;
         }
       }