ultralytics 8.0.43 optimized Results class and fixes (#1069)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Alexander Duda <Alexander.Duda@me.com>
Co-authored-by: Laughing <61612323+Laughing-q@users.noreply.github.com>

ultralytics/yolo/v8/segment/predict.py

@@ -59,7 +59,7 @@ class SegmentationPredictor(DetectionPredictor):
 
         result = results[idx]
         if len(result) == 0:
-            return log_string
+            return f'{log_string}(no detections), '
         det, mask = result.boxes, result.masks  # getting tensors TODO: mask mask,box inherit for tensor
 
         # Print results