byte count vs wchar count problem

```
inline std::wstring Reader::MatchNumber(InputStream& inputStream)
{
   const wchar_t sNumericChars[] = L"0123456789.eE-+";
   std::set<wchar_t> numericChars;
   numericChars.insert(sNumericChars, sNumericChars + sizeof(sNumericChars));
```

Insert should not use sizeof(array), rather use sizeof( array ) / sizeof(wchar_t)