PVS-Studio warning V597 for NSS

#define PORT_Memset   memset

static SECStatus ssl2_ClientSetupSessionCypher(....)
{
  ....
  PRUint8 keyData[SSL_MAX_MASTER_KEY_BYTES];
  ....
  loser2:
  done:
    PORT_Memset(keyData, 0, sizeof(keyData));
    PORT_ZFree(ekbuf, modulusLen);
    PORT_ZFree(eblock, modulusLen);
    SECKEY_DestroyPublicKey(serverKey);
    return rv;
}

This suspicious code was found in NSS project by PVS-Studio static code analyzer.
Warning message is:
V597 The compiler could delete the 'memset' function call, which is used to flush 'keyData' buffer. The RtlSecureZeroMemory() function should be used to erase the private data. sslcon.c 2151

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/