Update centerloss.py

ppcls/losses/centerloss.py

@@ -43,4 +43,5 @@ class CenterLoss(nn.Layer):
         dist = paddle.multiply(distmat,  mask)
         loss = paddle.sum(paddle.clip(dist, min=1e-12, max=1e+12)) / batch_size
 
-        return {'CenterLoss': loss}
\ No newline at end of file
+        return {'CenterLoss': loss}
+