PVS-Studio warning V597 for glibc

char *
__sha256_crypt_r (key, salt, buffer, buflen)
     const char *key;
     const char *salt;
     char *buffer;
     int buflen;
{
  ....
  unsigned char temp_result[32]
  ....
  memset (temp_result, '\0', sizeof (temp_result));
  ....
}

This suspicious code was found in glibc project by PVS-Studio static code analyzer.
Warning message is:
V597 The compiler could delete the 'memset' function call, which is used to flush 'temp_result' buffer. The RtlSecureZeroMemory() function should be used to erase the private data. sha256-crypt.c 385

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