rvec x_s[], /* Coords before update */
rvec prime[], /* Output coords */
t_nrnb *nrnb, /* Performance measure */
- real *lagr, /* The Lagrange multipliers */
+ real * const lagr, /* The Lagrange multipliers */
real lambda, /* FEP lambda */
real *dvdlambda, /* FEP force */
real invdt, /* 1/delta_t */