message: Fix alignment bug in demo helper
diff: @@ -1251,7 +1251,7 @@ private:
  }
  const VkAttachmentReference *MakeRealPtr(const VkAttachmentReference *ptr)
  {
  - return ptr + ptrdiff_t(attrefs.data()) / sizeof(VkAttachmentReference) - 1;
  + return attrefs.data() + ptrdiff_t(ptr) / sizeof(VkAttachmentReference) - 1;
  }
  std::vector<VkAttachmentReference> attrefs;
  