Simplification hashCode

src/migl/util/ConsListImpl.java

@@ -96,9 +96,7 @@ public class ConsListImpl<E> extends Cons<E, ConsList<E>> implements ConsList<E>
 	@Override
 	public int hashCode() {
 		final int prime = 31;
-        int result = 1;
-        result = prime * result + ((this.left() == null) ? 0 : this.left().hashCode());
-        result = prime * result + ((this.right() == null) ? 0 : this.right().hashCode());
+        int result = super.hashCode();
         return prime * result + this.size;
 	}