Function mpi::ffi::OMPI_C_MPI_NULL_DELETE_FN

pub unsafe extern fn OMPI_C_MPI_NULL_DELETE_FN(comm: MPI_Comm,
                                               comm_keyval: c_int,
                                               attribute_val_out: *mut c_void,
                                               extra_state: *mut c_void)
                                               -> c_int