message: Compile fix for circlesgrid in debug.
diff: //#define DEBUG_CIRCLES
  #ifdef DEBUG_CIRCLES
  +# include <iostream>
  # include "opencv2/opencv_modules.hpp"
  # ifdef HAVE_OPENCV_HIGHGUI
  # include "opencv2/highgui.hpp"
  @@ -289,7 +290,7 @@ void CirclesGridClusterFinder::findOutsideCorners(const std::vector<cv::Point2f>
  #ifdef DEBUG_CIRCLES
  drawPoints(outsideCorners, cornersImage, 2, Scalar(128));
  - imshow("corners", outsideCornersImage);
  + imshow("corners", cornersImage);
  #endif
  }
  @@ -417,7 +418,7 @@ void CirclesGridClusterFinder::parsePatternPoints(const std::vector<cv::Point2f>
  if(distsbuf[0] > maxRectifiedDistance)
  {
  #ifdef DEBUG_CIRCLES
  - cout << "Pattern not detected: too large rectified distance" << endl;
  + std::cout << "Pattern not detected: too large rectified distance" << std::endl;
  #endif
  centers.clear();
  return;
  @@ -1531,7 +1532,7 @@ void CirclesGridFinder::getCornerSegments(const std::vector<std::vector<size_t>
  if (!isClockwise)
  {
  #ifdef DEBUG_CIRCLES
  - cout << "Corners are counterclockwise" << endl;
  + std::cout << "Corners are counterclockwise" << std::endl;
  #endif
  std::reverse(segments.begin(), segments.end());
  std::reverse(cornerIndices.begin(), cornerIndices.end());
  