bug with factorize

[gorzel]

I don't know wheter it is due to libfac or factory, but occurs unaltered since Singular 3-0-3 up-to the latest version of Singular 3-1-2 from today 7-April-2011

> ring rc =(0,c),(x,y),dp;
> minpoly = c2+1/4c-1/16;
> poly fx = x2+(-1/4c)*x+(-1/256c+1/1024);
> factorize(fx);
[1]:
   _[1]=1
   _[2]=x+(-1/8c)
[2]:
   1,2
> poly fxy = homog(fx,y);
> fxy;
x2+(-1/4c)*xy+(-1/256c+1/1024)*y2
> factorize(fxy);    // should be the homogenized result of above
[1]:
   _[1]=1
   _[2]=x+(-1/8c)*y
   _[3]=0                       // BUG here
[2]:
   1,2,1

[mlee]

fixed with 14302