fix windows bug (#4431)

Author: gongenlei

paddlenlp/transformers/pegasus/modeling.py

@@ -42,7 +42,9 @@ def shift_tokens_right(input_ids, pad_token_id, decoder_start_token_id):
     if pad_token_id is None:
         raise ValueError("self.model.config.pad_token_id has to be defined.")
 
-    shifted_input_ids = paddle.where(shifted_input_ids == -100, pad_token_id, shifted_input_ids)
+    shifted_input_ids = paddle.where(
+        shifted_input_ids == -100, paddle.full_like(shifted_input_ids, pad_token_id), shifted_input_ids
+    )
     return shifted_input_ids