Add support for int(r) just like the other numeric classes.
diff --git a/Lib/rational.py b/Lib/rational.py
index 60cd129..6824f4a 100755
--- a/Lib/rational.py
+++ b/Lib/rational.py
@@ -376,6 +376,8 @@
         else:
             return a.numerator // a.denominator
 
+    __int__ = __trunc__
+
     def __floor__(a):
         """Will be math.floor(a) in 3.0."""
         return a.numerator // a.denominator