PVS-Studio warning V595 for Pixie

inline void getContainer(FILE *out,int type,
          CVariable *&dest,CExpression *src)
{
  ...
  fprintf(out,"%s %s %s\n",
    opcode,nDest->codeName(),dest->codeName());

  if (dest != NULL) {
    sdr->releaseRegister(dest);
  }
  ...
}

This suspicious code was found in Pixie project by PVS-Studio static code analyzer.
Warning message is:
V595 The 'dest' pointer was utilized before it was verified against nullptr. Check lines: 86, 88. sdrc expression.cpp 86

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