modStd() yields wrong result

[steenpass]

In the following example, the result of modStd() is wrong:

> option(noloadLib);
> LIB "modstd.lib";
> ring r = (0,a), (x,y,z), dp;
> module m = a*x*gen(1)+prime(2^29)*y*gen(3), y*gen(2), z*gen(3);
> std(m);
_[1]=z*gen(3)
_[2]=y*gen(2)
_[3]=(a)*x*gen(1)+536870909*y*gen(3)
> modStd(m);
// ** Ip is no standard basis
// ** Ip is no standard basis
// ** Ip is no standard basis
_[1]=z*gen(1)
_[2]=y*gen(1)
_[3]=x*gen(1)
> 

Also note the warnings which should not be there.

[hannes]

fixed with 8ac0543abc53e49f3dfa217c1250d95fa23928fb