message: Fix signature of static collectCalibrationData()
  This is a fix to the signature of static function
  collectCalibrationData() and clean-up for Since fallback scheme
  in calibration method selection is not used anymore. As an input
  parameter, iFixedPoint should be passed by value according to the OpenCV
  coding style guide.
diff: @@ -3330,7 +3330,7 @@ namespace cv
  static void collectCalibrationData( InputArrayOfArrays objectPoints,
  InputArrayOfArrays imagePoints1,
  InputArrayOfArrays imagePoints2,
  - int& iFixedPoint,
  + int iFixedPoint,
  Mat& objPtMat, Mat& imgPtMat1, Mat* imgPtMat2,
  Mat& npoints )
  {
  @@ -3419,8 +3419,7 @@ static void collectCalibrationData( InputArrayOfArrays objectPoints,
  Mat& objPtMat, Mat& imgPtMat1, Mat* imgPtMat2,
  Mat& npoints )
  {
  - int iFixedPoint = -1;
  - collectCalibrationData( objectPoints, imagePoints1, imagePoints2, iFixedPoint, objPtMat, imgPtMat1,
  + collectCalibrationData( objectPoints, imagePoints1, imagePoints2, -1, objPtMat, imgPtMat1,
  imgPtMat2, npoints );
  }
  