Made more changes per review

segmentation/include/pcl/segmentation/extract_labeled_clusters.h

@@ -232,7 +232,7 @@ class LabeledEuclideanClusterExtraction : public PCLBase<PointT> {
 
   /** \brief The maximum number of labels we can find in this pointcloud (default =
    * MAXINT)*/
-  unsigned int max_label_{0};
+  unsigned int max_label_{std::numeric_limits<int>::max()};
 
   /** \brief Class getName method. */
   virtual std::string

segmentation/include/pcl/segmentation/impl/region_growing.hpp

@@ -54,16 +54,7 @@
 
 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 template <typename PointT, typename NormalT>
-pcl::RegionGrowing<PointT, NormalT>::RegionGrowing()
-: max_pts_per_cluster_(std::numeric_limits<pcl::uindex_t>::max())
-, theta_threshold_(30.0f / 180.0f * static_cast<float>(M_PI))
-, search_()
-, normals_()
-, point_neighbours_(0)
-, point_labels_(0)
-, num_pts_in_segment_(0)
-, clusters_(0)
-{}
+pcl::RegionGrowing<PointT, NormalT>::RegionGrowing() = default;
 
 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 template <typename PointT, typename NormalT>

segmentation/include/pcl/segmentation/region_growing.h

@@ -312,21 +312,21 @@ namespace pcl
       NormalPtr normals_{nullptr};
 
       /** \brief Contains neighbours of each point. */
-      std::vector<pcl::Indices> point_neighbours_;
+      std::vector<pcl::Indices> point_neighbours_{};
 
       /** \brief Point labels that tells to which segment each point belongs. */
-      std::vector<int> point_labels_;
+      std::vector<int> point_labels_{};
 
       /** \brief If set to true then normal/smoothness test will be done during segmentation.
         * It is always set to true for the usual region growing algorithm. It is used for turning on/off the test
         * for smoothness in the child class RegionGrowingRGB.*/
       bool normal_flag_{true};
 
       /** \brief Tells how much points each segment contains. Used for reserving memory. */
-      std::vector<pcl::uindex_t> num_pts_in_segment_;
+      std::vector<pcl::uindex_t> num_pts_in_segment_{};
 
       /** \brief After the segmentation it will contain the segments. */
-      std::vector <pcl::PointIndices> clusters_;
+      std::vector <pcl::PointIndices> clusters_{};
 
       /** \brief Stores the number of segments. */
       int number_of_segments_{0};