gc.hpp: Optimise list traversal

rt/include/typon/fundamental/gc.hpp

@@ -109,7 +109,8 @@ namespace typon::fdt::lock_free
 
     void reclaim(u64 oldest) noexcept
     {
-      while (auto tail = _tail.load())
+      auto tail = _tail.load();
+      while (tail)
       {
         if (tail->_stamp >= oldest)
         {
@@ -123,6 +124,7 @@ namespace typon::fdt::lock_free
         if (_tail.compare_exchange_strong(tail, next))
         {
           delete tail;
+          tail = next;
         }
       }
     }