This was needed before, but not any more.

This is almost completely benign, and happens when profiling.

Previously, they were just used to filter out reflections outside the resolution range, and the bins would
be calculated from the resolution limits of whatever was left.  Now, the given values are used exactly
for calculating the bins.

This fixes a regression introduced by ad2c84d0, predating the initial CrystFEL release.

This fixes some incorrect behaviour introduced by c7712c20.

D'oh