Wrong time scaling in ObserverTimeEvolution

[JanNiklasB]

Dear All,

the non logarithmic time scaling of the ObserverTimeEvoultion module in the function ObserverTimeEvolution::addTimeRange
in the current master of CRPropa adds the time like min + index * (max - min) / numb.
However, since the maximum index is numb-1, the function only adds times in the range of
(min, min + (numb-1) * (max - min) / numb).

The expected behavior would be a range of time like (min, max),
this can be achieved by calculating the maximum time like min + index * (max - min) / (numb - 1)

[lukasmerten]

Hi @JanNiklasB
If you have time to provide a fix, I will be happy to check and merge the PR. Otherwise, thanks for reporting the issue.