[Fix] paddle support stride, fix oom (#3413)

* paddle support stride, fix oom

* refine

Author: wanghuancoder

Diff for: paddleseg/models/losses/semantic_connectivity_loss.py

@@ -142,7 +142,10 @@ def compute_class_connectiveity(pred_conn, label_conn, pred_num_conn,
         pair_conn_num = 0
 
         for j in range(1, pred_num_conn):
-            pred_j_mask = pred_conn[:, :, j]
+            if hasattr(paddle.Tensor, "contiguous"):
+                pred_j_mask = pred_conn[:, :, j].contiguous()
+            else:
+                pred_j_mask = pred_conn[:, :, j]
             pred_j = pred_j_mask * pred
 
             iou = compute_iou(pred_j, label_i, zero)