Empty Aos in equilibrium

Aos with no data in them now have 0 size.

matlab/TCV_IMAS/tcv_get_ids_equilibrium.m

@@ -357,4 +357,18 @@ end
 ids_equilibrium.grids_ggd = {};
 for it=1:numel(ids_equilibrium.time_slice)
   ids_equilibrium.time_slice{it}.ggd = {};
+  ids_equilibrium.time_slice{it}.boundary.strike_point = {};
+  ids_equilibrium.time_slice{it}.boundary_separatrix.x_point = {};
+  ids_equilibrium.time_slice{it}.boundary_separatrix.strike_point = {};
+  ids_equilibrium.time_slice{it}.constraints.bpol_probe = {};
+  ids_equilibrium.time_slice{it}.constraints.faraday_angle = {};
+  ids_equilibrium.time_slice{it}.constraints.mse_polarisation_angle = {};
+  ids_equilibrium.time_slice{it}.constraints.flux_loop = {};
+  ids_equilibrium.time_slice{it}.constraints.iron_core_segment = {};
+  ids_equilibrium.time_slice{it}.constraints.n_e = {};
+  ids_equilibrium.time_slice{it}.constraints.n_e_line = {};
+  ids_equilibrium.time_slice{it}.constraints.pf_current = {};
+  ids_equilibrium.time_slice{it}.constraints.pressure = {};
+  ids_equilibrium.time_slice{it}.constraints.q = {};
+  ids_equilibrium.time_slice{it}.constraints.x_point = {};
 end