PVS-Studio warning V597 for QT

static inline void sha1ProcessChunk(
  Sha1State *state, const unsigned char *buffer)
{
  ....
  quint8 chunkBuffer[64];
  ....
  #ifdef SHA1_WIPE_VARIABLES
    a = b = c = d = e = 0;
    memset(chunkBuffer, 0, 64);
  #endif
}

This suspicious code was found in QT project by PVS-Studio static code analyzer.
Warning message is:
V597 The compiler could delete the 'memset' function call, which is used to flush 'chunkBuffer' buffer. The RtlSecureZeroMemory() function should be used to erase the private data. sha1.cpp 191

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