The documentation states:

  "For T types that have a CToReactorT<> specialization,
  CToReactorPtrT<T>::type resolves to Pointer< CToReactorT<T> >,
  otherwise CToReactorPtrT<T>::type resolves to Pointer<Byte>."

However, the CToReactorPtrT<T>::cast() function did not behave
correctly for some Pointer<Byte> cases. Now fixed.

Bug: b/143479561
Change-Id: I64387653e9edf21eb7fa91e3bcb7b76171c7bca4
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/38389Tested-by: Ben Clayton <bclayton@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>