predef can not be used in scilab.ini (.scilab)

Reported by Allan CORNET

-- Bug description --


predef can not be used in scilab.ini (.scilab)


-- Scilab error message --


Initialisation :
  Chargement de l'environnement de travail
clear _DEFAULT_LN_;
 !--error 13 
Redéfinition d'une variable permanente.

at line     188 of exec file called by :    
exec('SCI/etc/scilab.start',-1);;


-- How to reproduce the bug --


mputl('MYPROTECTEDVARIABLE = 666;predef(predef()+1);',SCIHOME+'/scilab.ini')
and restart scilab