PVS-Studio warning V637 for TortoiseGIT

svn_error_t *
svn_mergeinfo__adjust_mergeinfo_rangelists(....)
{
  ....
  if (range->start + offset > 0 && range->end + offset > 0)
  {
    if (range->start + offset < 0)
      range->start = 0;
    else
      range->start = range->start + offset;

    if (range->end + offset < 0)
      range->end = 0;
    else
      range->end = range->end + offset;
  ....
}

This suspicious code was found in TortoiseGIT project by PVS-Studio static code analyzer.
Warning message is:
V637 Two opposite conditions were encountered. The second condition is always false. Check lines: 2464, 2466. TortoiseGitMerge mergeinfo.c 2464

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