Found Bug: Passing false request_array address

[onewayforever]

191 if (!flag_sends) {
192 MPI_Testall((k+1)/2, &request_array[(k+1)/2-1], &flag_sends, &status_array[(k+1)/2-1]);
193 if (flag_sends) { TIME_END_SEND; }
194 }

should be
192 MPI_Testall((k+1)/2, &request_array[(k+1)/2], &flag_sends, &status_array[(k+1)/2]);