merge branch origin/Fix_leak-STL_Extension-GF

Remove memory leaks detected by AddressSanitizer.
Tested in CGAL-4.4-Ic-54 and CGAL-4.4-Ic-55.
Approved by the release manager.

STL_Extension/include/CGAL/Compact_container.h

@@ -612,6 +612,7 @@ void Compact_container<T, Allocator>::merge(Self &d)
     set_type(d.first_item, last_item, BLOCK_BOUNDARY);
     last_item = d.last_item;
   }
+  all_items.insert(all_items.end(), d.all_items.begin(), d.all_items.end());
   // Add the sizes.
   size_ += d.size_;
   // Add the capacities.

STL_Extension/include/CGAL/Handle_with_policy.h

@@ -555,6 +555,7 @@ public:
                     }
                 } else {
                     h.delete_rep( rep); // we have to delete the current rep
+		    tmp->remove_reference();
                 }                
                 rep = tmp;
             }

STL_Extension/test/STL_Extension/test_In_place_list.cpp

@@ -884,10 +884,11 @@ void test_In_place_list() {
     assert( l.size() == 5);
     assert( std::equal( l.begin(), l.end(), b));
   }
+
   {
     typedef CGAL::In_place_list<Cont,false> ContList;
     typedef CGAL::In_place_list<Cont,false>::iterator Iterator;
-
+  
     ContList L;
     L.push_back(* new Cont(3));
     L.push_back(* new Cont(5));
@@ -900,7 +901,10 @@ void test_In_place_list() {
     for (++it2; it2 != L.end(); it1=it2, ++it2) {
       assert( (*it1).i_ <= (*it2).i_ );
     }
+    
+    L.destroy();
   }
+
 }
 
 int main() {

STL_Extension/test/STL_Extension/test_stl_extension.cpp

@@ -1663,7 +1663,7 @@ void test_Iterator_project()
     l.destroy();
     l2.destroy();
     }
-    
+
     //
     //
     //============================================
@@ -1990,7 +1990,7 @@ void test_Iterator_project()
     l.destroy();
     l2.destroy();
     }
-    
+
     //
     //
     //============================================
@@ -2888,8 +2888,14 @@ void test_Iterator_project()
     }
     CGAL::Assert_iterator( c_begin);
     CGAL::Assert_iterator( c_end);
+
+    while(! l.empty()){
+      delete static_cast<item*>(l.back());
+      l.pop_back();
     }
-  
+
+    }
+
     //
     //
     //============================================
@@ -5172,6 +5178,7 @@ void test_Circulator_on_node() {
       delete start;
       start = p;
     }
+    delete end;
   }
 }
 void test_N_step_adaptor() {