only the counts must be tight

lSize must be num_edges as we use an array for edge property
we access using halfedge index properties

Author: sloriot

Surface_mesh_simplification/include/CGAL/Surface_mesh_simplification/Detail/Edge_collapse_impl.h

@@ -111,11 +111,11 @@ namespace Surface_mesh_simplification
 
   Equal_3 equal_points = Traits().equal_3_object();
 
-  size_type lSize = static_cast<size_type>(
-                      std::distance( boost::begin(edges(mSurface)),
-                                     boost::end(edges(mSurface)) ) );
+  size_type lSize = num_edges(mSurface);
 
-  mInitialEdgeCount = mCurrentEdgeCount = lSize;
+  mInitialEdgeCount = mCurrentEdgeCount = static_cast<size_type>(
+                      std::distance( boost::begin(edges(mSurface)),
+                                     boost::end(edges(mSurface)) ) );;
 
   mEdgeDataArray.reset( new Edge_data[lSize] ) ;