There is a problem of convergence in the roots function for some polynomials
Reported by Yann COLLETTE
-- Bug description --
There is a problem of convergence in the roots function for some form of polynoms.
-- Scilab error message --
-- How to reproduce the bug --
x=poly(0,"x")
p=x^16-x^15-x^14-x^13-2*x^12+x^10-2*x^9+x^8-x^7-x^6+x^3+2*x^2+x+1
// and now, each time you try to compute roots :
-->roots(p)
!--error 24
Problème de convergence ...
-->roots(p+0*%pi)
!--error 24