SLS: Fix warnings

Straight_skeleton_2/examples/Straight_skeleton_2/extrude_skeleton.cpp

@@ -12,6 +12,7 @@
 #include <CGAL/boost/graph/IO/polygon_mesh_io.h>
 #include <CGAL/Polygon_2.h>
 #include <CGAL/Real_timer.h>
+#include <CGAL/Random.h>
 
 #include <boost/shared_ptr.hpp>
 
@@ -62,7 +63,7 @@ int main(int argc, char** argv)
 
   // below is only used for random weight generation
   double min_weight = 1., max_weight = 10.;
-  int seed = std::time(nullptr);
+  int seed = CGAL::get_default_random().get_seed();
 
   for(int i = 1; i < argc; ++i)
   {

Straight_skeleton_2/examples/Straight_skeleton_2/include/CGAL/input_helpers.h

@@ -247,7 +247,7 @@ void generate_random_weights(const PolygonWithHoles& p,
 
     std::vector<FT> weights;
     for(auto it=c.begin(); it<c.end(); ++it)
-      weights.push_back(weight[it]);
+      weights.push_back(FT(weight[it]));
 
     return weights;
   };

Straight_skeleton_2/test/Straight_skeleton_2/test_sls_weighted_polygons_with_holes.cpp

@@ -54,7 +54,7 @@ int main(int argc, char** argv)
 
   int hole_n = (argc > 1) ? std::atoi(argv[1]) : 2;
   int hole_nv = (argc > 2) ? std::atoi(argv[2]) : 10;
-  int seed = (argc > 3) ? std::atoi(argv[3]) : std::time(nullptr);
+  int seed = (argc > 3) ? std::atoi(argv[3]) : CGAL::get_default_random().get_seed();
 
   CGAL::Random rnd(seed);