Fix build break on glibc, for real.

    const Vector<size_t>* offsetsForString(const String16& val) const;

private:

#ifdef __GLIBC__

    static int config_sort(const void* lhs, const void* rhs, void* state);

#else

    static int config_sort(void* state, const void* lhs, const void* rhs);

#endif

    const bool                              mUTF8;