Fix(record): correct MJPEG upside-down playback

and remove 0-byte AVI residue on encoder open failure

server/2015Remote/ScreenSpyDlg.cpp

@@ -1911,6 +1911,7 @@ void CScreenSpyDlg::OnSysCommand(UINT nID, LPARAM lParam)
         FCCHandler handler = nID == IDM_SAVEAVI ? ENCODER_MJPEG : ENCODER_H264;
         int code;
         if (code = m_aviStream.Open(m_aviFile, m_BitmapInfor_Full, rate, handler)) {
+            DeleteFile(m_aviFile); // 删除 AVIFileOpen 残留的 0 字节文件
             MessageBoxL(CString("Create Video(*.avi) Failed:\n") + m_aviFile + "\r\n" + _TR("错误代码: ") +
                         CBmpToAvi::GetErrMsg(code).c_str(), "提示", MB_ICONINFORMATION);
             m_aviFile = _T("");