Add missing "if"

The sentence on line 51 was missing the word "if".

js/angular/directive/navView.js

@@ -48,7 +48,7 @@
  *   });
  * });
  * ```
- * Then on app start, $stateProvider will look at the url, see it matches the index state,
+ * Then on app start, $stateProvider will look at the url, see if it matches the index state,
  * and then try to load home.html into the `<ion-nav-view>`.
  *
  * Pages are loaded by the URLs given. One simple way to create templates in Angular is to put