int overflow in vdim

[malb]

Okay:

> ring R = 32003,(x),dp;
> ideal i = (x^32003 -x);
> vdim(std(i));
32003

Not okay:

> ring R = 32003,(x,y),dp;
> ideal i = (x^32003 -x,y^32003 -y);
> vdim(std(i));
1024192009

> ring R = 32003,(x,y,z),dp;
> ideal i = (x^32003 -x,y^32003 -y,z^32003 -z);
> vdim(std(i));
-1973539045

[malb]

Woops, sorry, the first not okay is of course correct. The second clearly isn't.