The integers were simply rounded to integers, which might give
ugly intervals (e.g. multiples of 3). Use the code of the
statistics tab, with one modification: take care not to
use intervals below the given precision. The statistics work
differently: there, the precision is adjusted according to
the interval size, not the other way around.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
3e11c13100