fix _resize_seg bug in Resize data transforms (open-mmlab#246)

Author: Junjun2016

mmseg/datasets/pipelines/transforms.py

@@ -195,7 +195,7 @@ def _resize_seg(self, results):
             else:
                 gt_seg = mmcv.imresize(
                     results[key], results['scale'], interpolation='nearest')
-            results['gt_semantic_seg'] = gt_seg
+            results[key] = gt_seg
 
     def __call__(self, results):
         """Call function to resize images, bounding boxes, masks, semantic