Update JointsDataset.py

Author: JunweiLiang

lib/dataset/JointsDataset.py

@@ -136,6 +136,7 @@ def __getitem__(self, idx):
 
         if data_numpy is None:
             logger.error('=> fail to read {}'.format(image_file))
+            return None
             #raise ValueError('Fail to read {}'.format(image_file))
 
         joints = db_rec['joints_3d']