Groovyc stub generation doesn't handle all primitive types properly

The problem manifests when a long value is effectively being changed to an 'int' and results in an exception during compilation.

Example class:

class AnObject {
    public static final long serialVersionUID = -5239748510188117876L
}

Using groovy 1.8.5, the generated stub (during joint compilation using the 'Groovyc' ant taskdef) looks like (sans imports):

public class AnObject implements
    groovy.lang.GroovyObject {
public static final long serialVersionUID = -5239748510188117876;
}

The problem is that this yields a compilation exception 'integer number too large'.

If you exclude the 'public' keyword on the member definition and re-compile, the stub instead looks like:

public class AnObject implements
    groovy.lang.GroovyObject {
public static final  long getSerialVersionUID() { return (long)0;}
}

This can then compile successfully.