Removed a warning showing in the no-mpi case.
Removed a warning showing in the no-mpi case.

johannrudi/libsc,johannrudi/libsc,johannrudi/libsc,johannrudi/libsc,cburstedde/libsc,johannrudi/libsc,cburstedde/libsc,cburstedde/libsc,cburstedde/libsc,cburstedde/libsc