Get file size error

[LoveChina-3000]

In line 879 code，On 32-bite ，Get file size error，I modified part of the code 。

inline unsigned __int64 query_file_size(file_handle_type handle, std::error_code& error)
{
error.clear();
#ifdef _WIN32
// LARGE_INTEGER file_size;
// if(::GetFileSizeEx(handle, &file_size) == 0)
// {
// error = detail::last_error();
// return 0;
// }
//return static_cast<int64_t>(file_size.QuadPart);

DWORD dwFileSizeHigh;
__int64 qwFileSize = GetFileSize(handle, &dwFileSizeHigh);
qwFileSize += (((_int64)dwFileSizeHigh) << 32);
return qwFileSize;

#else // POSIX
struct stat sbuf;
if(::fstat(handle, &sbuf) == -1)
{
error = detail::last_error();
return 0;
}
return sbuf.st_size;
#endif
}