fixing categories with null parentCids, again

src/categories.js

@@ -252,12 +252,14 @@ var async = require('async'),
 		Categories.getMultipleCategoryFields(cids, ['parentCid'], function(err, data) {
 			if (err) {
 				return callback(err);
-			} else if (!data.hasOwnProperty('parentCid')) {
-				data.parentCid = 0;
 			}
 
 			var parentCids = data.map(function(category) {
-				return category && category.parentCid;
+				if (category && category.hasOwnProperty('parentCid') && category.parentCid) {
+					return category.parentCid;
+				} else {
+					return 0;
+				}
 			});
 
 			Categories.getCategoriesData(parentCids, callback);