Fix GCC compile

AlexeyAB

2018-08-16 c2a8cc2ad3f4b31243cbf577440ee45bafcc7f92

 src/cost_layer.h

@@ -1,7 +1,7 @@
#ifndef COST_LAYER_H
#define COST_LAYER_H
#include "params.h"
#include "layer.h"
#include "network.h"

typedef layer cost_layer;