Fix winHttp WebSocket regression cause by message fragment changes (#663)

Source/HTTP/WinHttp/winhttp_connection.cpp

@@ -1370,6 +1370,7 @@ void WinHttpConnection::callback_websocket_status_read_complete(
     }
     else if (wsStatus->eBufferType == WINHTTP_WEB_SOCKET_UTF8_MESSAGE_BUFFER_TYPE || wsStatus->eBufferType == WINHTTP_WEB_SOCKET_BINARY_MESSAGE_BUFFER_TYPE)
     {
+        pRequestContext->m_websocketReceiveBuffer.FinishWriteData(wsStatus->dwBytesTransferred);
         pRequestContext->WebSocketReadComplete(wsStatus->eBufferType == WINHTTP_WEB_SOCKET_BINARY_MESSAGE_BUFFER_TYPE, pRequestContext->m_websocketReceivingMessageFragments, true);
         pRequestContext->WebSocketReadAsync();
     }