message: bitmap: remove clang-specific warning
diff: @@ -274,8 +274,15 @@ public:
  /// Clears out the bitmap array.
  void clear(void) {
  +#ifdef __clang__
  +#pragma GCC diagnostic push
  +#pragma GCC diagnostic ignored "-Wtautological-pointer-compare"
  +#endif
  if (unlikely(Super::_bits == nullptr))
  return;
  +#ifdef __clang__
  +#pragma GCC diagnostic pop
  +#endif
  const auto wordCount = byteCount() / sizeof(size_t);
  // use an explicit array since these may be atomic_size_t's
  