bugfix: ecef2geodetic inside bug from 2.6.0
when implementing the speedup of 2.6.0, a mistake was made in ecef2geodetic that could cause an exception. This is now fixed thanks to @dschurman
when implementing the speedup of 2.6.0, a mistake was made in ecef2geodetic that could cause an exception. This is now fixed thanks to @dschurman