Generate correct hashCode when callSuper and no fields included. Fixes #1505

test/transform/resource/after-ecj/EqualsAndHashCodeConfigKeys2.java

@@ -66,8 +66,7 @@
   }
   public @java.lang.Override @java.lang.SuppressWarnings("all") @javax.annotation.Generated("lombok") int hashCode() {
     final int PRIME = 59;
-    int result = 1;
-    result = ((result * PRIME) + super.hashCode());
+    int result = super.hashCode();
     result = ((result * PRIME) + this.x);
     return result;
   }