add constraints description

tested on TCV

matlab/TCV_IMAS/tcv_get_ids_equilibrium.m

@@ -285,7 +285,6 @@ if ntime > 0
   for name = ununsed_constraints, constraints_orig.(name{1})={}; end
   constraints_desc.ununsed_constraints = ununsed_constraints;
 end
-keyboard
 for it = 1:ntime
   constraints = constraints_orig;
   % bpol_probe
@@ -344,6 +343,7 @@ for it = 1:ntime
   ids_equilibrium.time_slice{it}.constraints = constraints;
 end
 
+ids_equilibrium_description.constraints = constraints_desc;
 
 %
 %% profiles_1d (cannot use eqdsk since not same radial mesh)