PVS-Studio warning V595 for WinMerge

static DIFFITEM *AddToList(const String &sLeftDir,
 const String &sRightDir,
 const DirItem * lent, const DirItem * rent,
 UINT code, DiffFuncStruct *myStruct, DIFFITEM *parent)
{
  ...
  if (lent)
  {
    ...
  }
  else
  {
    di->left.filename = rent->filename;
  }

  if (rent)
  {
  ...
}

This suspicious code was found in WinMerge project by PVS-Studio static code analyzer.
Warning message is:
V595 The 'rent' pointer was utilized before it was verified against nullptr. Check lines: 608, 611. Merge dirscan.cpp 608

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