message: fix JpegEncoder::write
  3rdparty/libjpeg-turbo/src/jpeglib.h:
  `* NB: you must set up the error-manager BEFORE calling jpeg_create_xxx.`
diff: @@ -602,9 +602,9 @@ bool JpegEncoder::write( const Mat& img, const std::vector<int>& params )
  JpegErrorMgr jerr;
  JpegDestination dest;
  - jpeg_create_compress(&cinfo);
  cinfo.err = jpeg_std_error(&jerr.pub);
  jerr.pub.error_exit = error_exit;
  + jpeg_create_compress(&cinfo);
  if( !m_buf )
  {
  