PVS-Studio warning V595 for Cocos2d-x

template<>
inline bool BundleReader::readArray<std::string>(
  unsigned int *length, std::vector<std::string> *values)
{
  ....
  values->clear();             //<==
  if (*length > 0 && values)   //<==
  {
    for (int i = 0; i < (int)*length; ++i)
    {
      values->push_back(readString());
    }
  }
  return true;
}

This suspicious code was found in Cocos2d-x project by PVS-Studio static code analyzer.
Warning message is:
V595 The 'values' pointer was utilized before it was verified against nullptr. Check lines: 188, 189. ccbundlereader.h 188

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