Fix concat (#4755)

* fix init

* update

* fix cgan

Author: ceci3

PaddleCV/gan/network/CGAN_network.py

@@ -42,7 +42,7 @@ def __init__(self, batch_size=1):
 
     def network_G(self, input, label, name="generator"):
         # concat noise and label
-        y = fluid.layers.reshape(label, shape=[-1, self.y_dim, 1, 1])
+        y = fluid.layers.reshape(label, shape=[-1, self.y_dim])
         xy = fluid.layers.concat([input, y], 1)
         o_l1 = linear(
             input=xy,