Bode plot - Limite de récursion atteinte (1000).

Reported by Sébastien Celles

BUG DESCRIPTION:
----------------

bode function doesn't work like when using Scilab 5.2.2

ERROR LOG:
----------

Limite de récursion atteinte (1000).



HOW TO REPRODUCE THE BUG:
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Install Scilab 6.0.x
Install CPGE Toolbox 1.6.3


Initialisation :
  Chargement de l'environnement de travail

Start iodelay toolbox 
	Load macros
	Load help
	Load demos

Start CPGE - Xcos toolbox
	Load macros
	Load palette - CPGE - Standard blocks
	Load help
	Load demos
	CPGE Version: 1.6.0

--> p = poly(0,'p');

--> H = syslin('c',2/(1+0.5*p));

--> bode(H,0.01,100)

Limite de récursion atteinte (1000).


OTHER INFORMATION:
------------------
Despite CPGE Toolbox 1.6.3 was installed, Scilab console displays CPGE Version: 1.6.0