changed mpi_vector.h again
changed mpi_vector.h again

mwiesenberger/feltor,e3reiter/feltor,mwiesenberger/feltor,e3reiter/feltor,mwiesenberger/feltor,e3reiter/feltor,e3reiter/feltor,mwiesenberger/feltor,e3reiter/feltor,feltor-dev/feltor,feltor-dev/feltor,feltor-dev/feltor,feltor-dev/feltor