Allowed multiplication of lazy() objects with int return type.

django/utils/functional.py

@@ -163,6 +163,9 @@ def lazy(func, *resultclasses):
         def __mod__(self, other):
             return self.__cast() % other
 
+        def __mul__(self, other):
+            return self.__cast() * other
+
     # Add wrappers for all methods from resultclasses which haven't been
     # wrapped explicitly above.
     for resultclass in resultclasses:

tests/utils_tests/test_functional.py

@@ -230,6 +230,7 @@ class FunctionalTests(SimpleTestCase):
         lazy_5 = lazy(lambda: 5, int)
         self.assertEqual(4 * lazy_5(), 20)
         self.assertEqual(lazy_4() * 5, 20)
+        self.assertEqual(lazy_4() * lazy_5(), 20)
 
     def test_lazy_mul_list(self):
         lazy_4 = lazy(lambda: [4], list)