Fix type issue

src/main/java/be/cylab/java/wowa/training/MainTest.java

@@ -70,7 +70,7 @@ public final class MainTest {
         start_time = System.currentTimeMillis();
         System.out.println("Neural Network learning");
         HashMap<MultiLayerNetwork, Double> map_nn = nn.runKFold(folds, 10);
-        end_time = System.currentTimeMillis()
+        end_time = System.currentTimeMillis();
         System.out.println("Execution time : " + (end_time - start_time) / 1000 + " seconds");
 
         double nn_score = 0.0;