message: Change naming of keypoints comparator
diff: namespace cv
  {
  -struct KeypointResponseGreaterThanThreshold
  +struct KeypointResponseGreaterThanOrEqualToThreshold
  {
  - KeypointResponseGreaterThanThreshold(float _value) :
  + KeypointResponseGreaterThanOrEqualToThreshold(float _value) :
  value(_value)
  {
  }
  @@ -83,7 +83,7 @@ void KeyPointsFilter::retainBest(std::vector<KeyPoint>& keypoints, int n_points)
  //use std::partition to grab all of the keypoints with the boundary response.
  std::vector<KeyPoint>::const_iterator new_end =
  std::partition(keypoints.begin() + n_points, keypoints.end(),
  - KeypointResponseGreaterThanThreshold(ambiguous_response));
  + KeypointResponseGreaterThanOrEqualToThreshold(ambiguous_response));
  //resize the keypoints, given this new end point. nth_element and partition reordered the points inplace
  keypoints.resize(new_end - keypoints.begin());
  }
  