Don't cast pk to int (again).

This commit -- http://github.com/jezdez/celery-haystack/commit/39edd7f86fc5c0ddf69d73ebe5114163b682ddfb -- was overwritten by a bad merge here -- http://github.com/jezdez/celery-haystack/commit/4c434bf78c5ca3db9e7d813d1d3d826cfc609d03.

Author: akestner

celery_haystack/tasks.py

@@ -67,7 +67,7 @@ def get_instance(self, model_class, pk, **kwargs):
         logger = self.get_logger(**kwargs)
         instance = None
         try:
-            instance = model_class._default_manager.get(pk=int(pk))
+            instance = model_class._default_manager.get(pk=pk)
         except model_class.DoesNotExist:
             logger.error("Couldn't load %s.%s.%s. Somehow it went missing?" %
                          (model_class._meta.app_label.lower(),