PVS-Studio warning V557 for IPP Samples

typedef Ipp32f samplefbout[2][18][32];
samplefbout fbout_data[NUM_CHANNELS];

static void mp3enc_join_LR_l2(MP3Enc *state)
{
  Ipp32s sb, j;
  Ipp32s sblimit_real = state->com.sblimit_real;

  for (sb = 0; sb < sblimit_real; sb++)
    for (j = 0; j < 36; j++)
      state->fbout_data[2][0][j][sb] =
        0.5f * (state->fbout_data[0][0][j][sb] +
        state->fbout_data[1][0][j][sb]);
}

This suspicious code was found in IPP Samples project by PVS-Studio static code analyzer.
Warning message is:
V557 Array overrun is possible. The value of 'j' index could reach 35. mp3_enc mp3enc_quantization_12_fp.c 639

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/