Major fix in ref pressure computation (bug introduced in ad32691, 2023-09-13)

Author: MartinFerrand

src/base/cs_pressure_correction.cpp

@@ -978,7 +978,7 @@ _pressure_correction_fv(int iterns,
  (1, phydr0, [=] CS_F_HOST_DEVICE(cs_lnum_t i,
  CS_DISPATCH_REDUCER_TYPE(double) &sum) {
 
- cs_lnum_t f_id_0 = isostd[n_b_faces] - 1;
+ cs_lnum_t f_id_0 = isostd[n_b_faces];
  if (f_id_0 > -1) {
  cs_lnum_t c_id_0 = b_face_cells[f_id_0];
  cs_real_t d[3] = {b_face_cog[f_id_0][0] - cell_cen[c_id_0][0],