'wire' cannot make connections to control registers of named units

[olofson]

This fails with "Expected control register":

    struct {
        env o3e;    wtosc o3
        wire o3e.out o3.a
    }

...but this works:

    struct {
        env o3e;    wtosc
        wire o3e.out a
    }

Seems like 'wire' is not checking for namespaces for the second argument.