[se16.patch](/uploads/6a6a36b4565eba8c75df11c31aa83be1/se16.patch) If only not to work around some compiler bug, these `and`s serve no purpose, and they get down to machine code. An optimization that would eliminate such `and`s at the node level could be slighly useful, but removing these two is something that can be done without using the brain at all...