PVS-Studio warning V614 for CyaSSL

static int ProcessMessage(....)
{
  int rhSize;
  ....
  notEnough = 0;
  ....
  if (sslBytes >= RECORD_HEADER_SZ) {
    if (GetRecordHeader(sslFrame, &rh, &rhSize) != 0) {
      ....
      return -1;
    }
  }
  else
    notEnough = 1;
  ....
  if (notEnough || rhSize > (sslBytes - RECORD_HEADER_SZ)) {
    ....
  }

  tmp = sslFrame + rhSize;   <<<---
  ....
}

This suspicious code was found in CyaSSL project by PVS-Studio static code analyzer.
Warning message is:
V614 Potentially uninitialized variable 'rhSize' used. sniffer.c 2255

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