Ensure i0 and lint integers are the same if DET_SIZE is set to 64 bits.
Ensure i0 and lint integers are the same if DET_SIZE is set to 64 bits.

As far as I know this has always been the case on all computers we've used (and will be
for all but very exotic hardware!) but let's be extra cautious.

hande-qmc/hande,hande-qmc/hande,ruthfranklin/hande,hande-qmc/hande,hande-qmc/hande,hande-qmc/hande