fixed typo in main js file, missed increment of list_id

In commit https://github.com/allaud/quick-ng-repeat/commit/b5e51acc06f620dc85f86247d8fc6c9c4cc4e9c3 referenced in issue https://github.com/allaud/quick-ng-repeat/issues/1, it looks like text was miscopied from the example quick-ng-repeat.js to the main quick-ng-repeat.js.  The iterator in `list_id` was not incremented and the update wasn't working for multiple instances of quick-ng-repeat.