[cherry-pick] Fix bugs for table-rec-pipe v2 (#4431)

* fix bug

* fix bug

Author: liu-jiaxuan

paddlex/inference/pipelines/table_recognition/pipeline_v2.py

@@ -1253,7 +1253,6 @@ def predict(
                         new_x1, new_y1 = img_height - tby2, tbx1
                         new_x2, new_y2 = img_height - tby1, tbx2
                     table_box = [new_x1, new_y1, new_x2, new_y2]
-                layout_det_res = {}
                 single_table_rec_res = self.predict_single_table_recognition_res(
                     doc_preprocessor_image,
                     overall_ocr_res,

paddlex/inference/pipelines/table_recognition/result.py

@@ -96,6 +96,8 @@ def __init__(self, data: Dict) -> None:
         super().__init__(data)
         HtmlMixin.__init__(self)
         XlsxMixin.__init__(self)
+        if self["layout_det_res"] is None:
+            self["layout_det_res"] = {}
 
     def _get_input_fn(self):
         fn = super()._get_input_fn()