gc.hpp: free remaining memory on destruction

rt/include/typon/fundamental/gc.hpp

@@ -121,6 +121,18 @@ namespace typon::fdt::lock_free
         }
       }
     }
+
+    ~gc()
+    {
+      delete[] _stamps;
+      auto tail = _tail.load();
+      while (tail)
+      {
+        auto next = tail->_next.load();
+        delete tail;
+        tail = next;
+      }
+    }
   };
 
 }