generate less code for serializer

src/main/jastadd/Backend.jadd

@@ -805,10 +805,12 @@ aspect NameResolutionHelper {
       r.generateContextDependentNameResolution(sb);
     }
 
+    if (resolverHelper) {
       for (TypeDecl decl : getTypeDeclList()) {
         decl.generateContextIndependentNameResolution(sb);
         sb.append("\n");
       }
+    }
     sb.append("}\n\n");
   }