static void find_tetra_order_grid(t_topology top, int ePBC,
int natoms, matrix box,
- rvec x[], int maxidx, int index[],
+ rvec x[], int maxidx, const int index[],
real *sgmean, real *skmean,
int nslicex, int nslicey, int nslicez,
real ***sggrid, real ***skgrid)