rejigged Topics.get so that it does not return a hardcoded return if no topics were returned

src/topics.js

@@ -75,7 +75,6 @@ marked.setOptions({
 				active_usernames = replies[1];
 				var topics = [];
 
-				if (tids.length > 0) {
 				title = replies[2];
 				uid = replies[3];
 				timestamp = replies[4];
@@ -93,6 +92,7 @@ marked.setOptions({
 				function generate_topic() {
 					if (!usernames || !has_read || !moderators || !teaser_info) return;
 
+					if (tids.length > 0) {
 						for (var i=0, ii=title.length; i<ii; i++) {
 							topics.push({
 								'title' : title[i],
@@ -111,6 +111,7 @@ marked.setOptions({
 								'teaser_username': teaser_info[i].username
 							});
 						}
+					}
 
 					// Float pinned topics to the top
 					topics = topics.sort(function(a, b) {
@@ -156,15 +157,14 @@ marked.setOptions({
 					teaser_info = teasers;
 					generate_topic();
 				});
-				}
+				// else {
-				else {
+				// 	callback({
-					callback({
+				// 		'category_name' : category_id ? category_name : 'Recent',
-						'category_name' : category_id ? category_name : 'Recent',
+				// 		'show_topic_button' : category_id ? 'show' : 'hidden',
-						'show_topic_button' : category_id ? 'show' : 'hidden',
+				// 		'category_id': category_id || 0,
-						'category_id': category_id || 0,
+				// 		'topics': []
-						'topics': []
+				// 	});
-					});
+				// }
-				}
 			});
 		});
 	}

src/user.js

@@ -447,9 +447,10 @@ var config = require('../config.js'),
 	};
 
 	User.get_usernames_by_uids = function(uids, callback) {
-		
 		var usernames = [];
 
+		if (!Array.isArray(uids)) return callback([]);
+		
 		for(var i=0, ii=uids.length; i<ii; ++i) {
 		
 			User.getUserField(uids[i],'username', function(username){