[pypy-issue] Issue #2248: float.__int__() calls a overridden __int__ method (pypy/pypy)

[Armin Rigo]

New issue 2248: float.__int__() calls a overridden __int__ method
https://bitbucket.org/pypy/pypy/issues/2248/float__int__-calls-a-overridden-__int__

Armin Rigo:

```
#!python

+    def test_override___int__(self):
+        class F(float):
+            def __int__(self):
+                return 666
+        assert int(F(-12.3)) == 666
+        assert float.__int__(F(-12.3)) == -12
```

The last assert fails on pypy but not cpython.  Investigate...