the ixc variable has to be as in
Small bugfix to correctly detect the xc functional if psp8 files are used for. the ixc variable has to be as in the following file https://www.e-cam2020.eu:10443/esl/pspio/blob/develop/src/abinit_xc.c l.44/45
- I have checked that my code follows the Octopus coding standards
-  I have added tests for all the new features added in this request.