show proper interrogate name instead of 'type'

dtool/src/interrogatedb/py_panda.cxx

@@ -82,7 +82,7 @@ DTOOL_Call_GetPointerThisClass(PyObject *self, Dtool_PyTypedObject *classdef,
         str << function_name << "() argument " << param << " must be ";
 
 
-        PyObject *fname = PyObject_GetAttrString((PyObject *)classdef->_PyType.ob_type, "__name__");
+        PyObject *fname = PyObject_GetAttrString((PyObject *)classdef, "__name__");
         if (fname != (PyObject *)NULL) {
           str << PyString_AsString(fname);
           Py_DECREF(fname);