message: Fix FFT on power-of-two data
diff: @@ -966,7 +966,7 @@ int get_psd_welch (double *data, int data_len, int nfft, int overlap, int sampli
  {
  output_ampl[i] = 0.0;
  }
  - for (int pos = 0; (pos + nfft) < data_len; pos += (nfft - overlap), counter++)
  + for (int pos = 0; (pos + nfft) <= data_len; pos += (nfft - overlap), counter++)
  {
  int res = get_psd (data + pos, nfft, sampling_rate, window_function, ampls, output_freq);
  if (res != (int)BrainFlowExitCodes::STATUS_OK)
  