ayy fix alexander

class IPhysicsSurfaceProps
{
public:

    surfacedata_t    *GetSurfaceData(int surfaceDataIndex)
    {
        typedef surfacedata_t*(__thiscall* fnGetSurfaceData)(void*, int);
        return call_vfunc<fnGetSurfaceData>(this, 5)(this, surfaceDataIndex);
    }
};