Comment 11 for bug 2043084

@vorlon I'll have to cross-reference more spec versions next week, but I suspect what's going in is the size of those fields were incorrect, but it happened to sometimes work (when the allocated memory didnt contain garbage) due to the offsets matching because of C struct packing rules adding padding after the 32-bit ints because they are followed by 64-bit pointers (and on 32-bit arches this is a no-op change).