Re-fix offset in get_predicted_polygons_with_confidence()

dan/predict/attention.py

@@ -115,7 +115,6 @@ def get_predicted_polygons_with_confidence(
     polygons = []
     start_index = 0
     for text_piece, confidence in zip(text_list, confidence_list):
-        start_index += len(text_piece) + offset
         polygon, _ = get_polygon(
             text_piece,
             max_value,
@@ -125,6 +124,7 @@ def get_predicted_polygons_with_confidence(
             threshold_value=threshold_value,
             size=(width, height),
         )
+        start_index += len(text_piece) + offset
         polygon["text"] = text_piece
         polygon["text_confidence"] = confidence
         polygons.append(polygon)