#7 Add Object::as_bool for Python2/Objects.hxx

[Ben Webb]

Please add the following code to the class Object in Python2/Objects.hxx

    // convert to bool
    bool as_bool() const
    {
        return PyObject_IsTrue( ptr() ) != 0;
    }

This will allow the same code to be used to support either version (2 or 3) of python

[Barry Alan Scott]

Not sure what was going on in 2008 but there are two functions to do the same test.
as_bool() and isTrue(). You could use isTrue until I release a new PyCXX.

commited as r347