message: createsamples: fix ROI in icvGetBackgroundImage()
diff: @@ -909,7 +909,7 @@ void icvGetBackgroundImage( CvBackgroundData* data,
  icvGetNextFromBackgroundData( data, reader );
  }
  - img = reader->img(Rect(reader->point.x, reader->point.y, data->winsize.height, data->winsize.width)).clone();
  + img = reader->img(Rect(reader->point.x, reader->point.y, data->winsize.width, data->winsize.height)).clone();
  if( (int) ( reader->point.x + (1.0F + reader->stepfactor ) * data->winsize.width )
  < reader->img.cols )
  