PVS-Studio warning V597 for CamStudio

char* crypt_md5(const char* pw, const char* salt)
{
  unsigned char final[MD5_SIZE];
  ....
  /* Don't leave anything around in vm they could use. */
  memset(final,0,sizeof final);
  return passwd;
}

This suspicious code was found in CamStudio project by PVS-Studio static code analyzer.
Warning message is:
V597 The compiler could delete the 'memset' function call, which is used to flush 'final' buffer. The RtlSecureZeroMemory() function should be used to erase the private data. md5.c 342

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/