Avoid passing allow_empty to the ListSerializer children.

rest_framework/serializers.py

@@ -113,8 +113,12 @@ class BaseSerializer(Field):
             kwargs['child'] = cls()
             return CustomListSerializer(*args, **kwargs)
         """
+        allow_empty = kwargs.pop('allow_empty', True)
         child_serializer = cls(*args, **kwargs)
-        list_kwargs = {'child': child_serializer}
+        list_kwargs = {
+            'child': child_serializer,
+            'allow_empty': allow_empty,
+        }
         list_kwargs.update(dict([
             (key, value) for key, value in kwargs.items()
             if key in LIST_SERIALIZER_KWARGS