message: Try to fix warning in concurrent queue
diff: @@ -134,7 +134,9 @@ namespace moodycamel { namespace details {
  namespace moodycamel { namespace details {
  typedef std::uintptr_t thread_id_t;
  static const thread_id_t invalid_thread_id = 0; // Address can't be nullptr
  +#ifdef MOODYCAMEL_CPP11_THREAD_LOCAL_SUPPORTED
  static const thread_id_t invalid_thread_id2 = 1; // Member accesses off a null pointer are also generally invalid. Plus it's not aligned.
  +#endif
  inline thread_id_t thread_id() { static MOODYCAMEL_THREADLOCAL int x; return reinterpret_cast<thread_id_t>(&x); }
  } }
  #endif
  