fix: don't try to decorate non-existent

packages/core/src/flecks.js

@@ -99,8 +99,10 @@ export default class Flecks {
             );
           }
           const key = transformer(this.symbolizePath(path));
+          if (Gathered[key]) {
             // eslint-disable-next-line no-param-reassign
             Gathered[key] = M(Gathered[key], flecks);
+          }
         });
       return Gathered;
     };