Define items

Author: misaochan

app/src/main/java/fr/free/nrw/commons/category/TitleCategories.java

@@ -37,6 +37,7 @@ protected ArrayList<String> doInBackground(Void... voids) {
 
         MWApi api = CommonsApplication.createMWApi();
         ApiResult result;
+        ArrayList<String> items = new ArrayList<>();
 
         //URL https://commons.wikimedia.org/w/api.php?action=query&format=xml&list=search&srwhat=text&srenablerewrites=1&srnamespace=14&srlimit=10&srsearch=
         try {