Bugfix: in VASP.5.2.11

Unfortunately every new release immediately triggers a few bugfixes:

Bugfix to nmr.F: ) One call to SETDIJ_AVEC_ should have been to SETDIJ_AVEC_ONE_CENTER

Bugfix to us.F: ) An END SUBROUTINE SETDIJ_AVEC_ should have been END SUBROUTINE SETDIJ_AVEC_ONE_CENTER

Bugfix to david_inner.F: ) Could not be compiled without scaLAPACK. Can be now, but will not work correctly [still heavily under development anyway].

We are very sorry for the inconvience.