fix bugs of dcg

src/controllers/dcg_noshare_controller.py

@@ -68,7 +68,7 @@ class DCGnoshareMAC (DeepCoordinationGraphMAC):
             # Without decomposition, the payoff_fun output must only be reshaped
             output = output.view(*output.shape[:-1], n, n)
         # The output of the backward messages must be transposed
-        output[1] = output[1].transpose(dim0=-2, dim1=-1)
+        output[1] = output[1].clone().transpose(dim0=-2, dim1=-1)
         # Compute the symmetric average of each edge with it's flipped counterpart
         return output.mean(dim=0)