Fix type comparision
Fix type comparision

Field n.elem cannot be used until we know that it is a field used
in the type, so we have to check first the op of the type.
This problem was generating errors in pointer type comparision.

k0gaMSX/scc,k0gaMSX/scc,8l/scc,k0gaMSX/scc,8l/scc,k0gaMSX/kcc,8l/scc,k0gaMSX/kcc