Add additional coercion support for "self subtypes" to int, long,
float (compare the recent checkin to complex).  Added tests for these.
diff --git a/Objects/longobject.c b/Objects/longobject.c
index 1e01bf0..8f7d9e4 100644
--- a/Objects/longobject.c
+++ b/Objects/longobject.c
@@ -2134,6 +2134,11 @@
 		Py_INCREF(*pv);
 		return 0;
 	}
+	else if (PyLong_Check(*pw)) {
+		Py_INCREF(*pv);
+		Py_INCREF(*pw);
+		return 0;
+	}
 	return 1; /* Can't do it */
 }