[cable] wrapping return Types which are not in classes

[Brad King]

> I have a problem wrapping classes that have enumerations outside of the
> class definition. The generated cable-code looks like the following:
[snip]
>      case ::::OF_error: name = "::::OF_error"; break;

This is a bug.  The problem is actually when the enumeration is in the
global namespace.  I've fixed the bug in the CVS version of cable.

-Brad