Prevent infinite recursion in `getPointCloudDifference`

[SergioRAgostinho]

pcl/segmentation/include/pcl/segmentation/segment_differences.h

Lines 62 to 72 in 22aed06

	template <typename PointT>
	PCL_DEPRECATED("getPointCloudDifference() does not use the tgt parameter, thus it is deprecated and will be removed in future releases.")
	inline void getPointCloudDifference (
	const pcl::PointCloud<PointT> &src,
	const pcl::PointCloud<PointT> &tgt,
	double threshold,
	const boost::shared_ptr<pcl::search::Search<PointT> > &tree,
	pcl::PointCloud<PointT> &output)
	{
	getPointCloudDifference<PointT> (src, pcl::PointCloud<PointT>(), threshold, tree, output);
	}

Needs to be changed to

  template <typename PointT>
  PCL_DEPRECATED("getPointCloudDifference() does not use the tgt parameter, thus it is deprecated and will be removed in future releases.")
  inline void getPointCloudDifference (
      const pcl::PointCloud<PointT> &src,
      const pcl::PointCloud<PointT> &, // removed parameter to suppress warning
      double threshold,
      const boost::shared_ptr<pcl::search::Search<PointT> > &tree,
      pcl::PointCloud<PointT> &output)
  {
    getPointCloudDifference<PointT> (src, threshold, tree, output); // without the extra parameter
  }

to prevent an infinite recursion.