add ckpt load

python/paddle/fluid/framework.py

@@ -490,7 +490,7 @@ class Operator(object):
             'recv', 'listen_and_serv', 'parallel_do', 'save_combine',
             'load_combine', 'ncclInit', 'channel_create', 'channel_close',
             'channel_send', 'channel_recv', 'select', 'checkpoint_save',
-            'checkpoint_save'
+            'checkpoint_load'
         }
         if type not in no_kernel_op_set:
             self.desc.infer_var_type(self.block.desc)