Added test, updated AUTHORS and changelog (#498)

AUTHORS

@@ -184,3 +184,4 @@ that much better:
  * Daniel Ward (https://github.com/danielward)
  * Aniket Deshpande (https://github.com/anicake)
  * rfkrocktk (https://github.com/rfkrocktk)
+ * Gustavo Andrés Angulo (https://github.com/woakas)

docs/changelog.rst

@@ -4,6 +4,7 @@ Changelog
 
 Changes in 0.8.5
 ================
+- Fixed count and none bug (#498)
 - Fixed bug with .only() and DictField with digit keys (#496)
 - Added user_permissions to Django User object (#491, #492)
 - Fix updating Geo Location fields (#488)

tests/queryset/queryset.py

@@ -2882,6 +2882,19 @@ class QuerySetTest(unittest.TestCase):
 
         self.assertEqual(10, Post.objects.limit(5).skip(5).count(with_limit_and_skip=False))
 
+    def test_count_and_none(self):
+        """Test count works with None()"""
+
+        class MyDoc(Document):
+            pass
+
+        MyDoc.drop_collection()
+        for i in xrange(0, 10):
+            MyDoc().save()
+
+        self.assertEqual(MyDoc.objects.count(), 10)
+        self.assertEqual(MyDoc.objects.none().count(), 0)
+
     def test_call_after_limits_set(self):
         """Ensure that re-filtering after slicing works
         """