Updates to fix error in use of Symmetry_Info.
This commits fix a number of small but possibly fatal errors.
- Symmetry_Info_Dmp can no longer be called after Symmetry_Info_Free.
- The seed to IsFreeUnit must be a valid number.
- the code in espf.f is changed to comply with 1)
- chklum.f is changed to comply with 2)
-
Documentation updated or not needed. -
Test created or not needed. -
Attribution in source files and CONTRIBUTORS.md
updated if necessary.