Fix MNISTAutoencoder: switch output layer to LEAKYRELU

SOFTMAX default does not work with autoencoders.

Signed-off-by: Marc Strapetz <[email protected]>

Author: mstrap

dl4j-examples/src/main/java/org/deeplearning4j/examples/quickstart/modeling/feedforward/unsupervised/MNISTAutoencoder.java

@@ -74,6 +74,7 @@ public static void main(String[] args) throws Exception {
                 .layer(new DenseLayer.Builder().nIn(10).nOut(250)
                         .build())
                 .layer(new OutputLayer.Builder().nIn(250).nOut(784)
+                        .activation(Activation.LEAKYRELU)
                         .lossFunction(LossFunctions.LossFunction.MSE)
                         .build())
                 .build();