fix to getRecentReplies causing count = 0 to return unlimited

src/categories.js

@@ -217,6 +217,10 @@ var db = require('./database.js'),
 	};
 
 	Categories.getRecentReplies = function(cid, count, callback) {
+		if(count === 0) {
+			return callback(null, []);
+		}
+
 		db.getSortedSetRevRange('categories:recent_posts:cid:' + cid, 0, count - 1, function(err, pids) {
 
 			if (err) {

src/routes/api.js

@@ -55,9 +55,9 @@ var path = require('path'),
 					});
 
 					function iterator(category, callback) {
-						categories.getRecentReplies(category.cid, category.numRecentTopics, function (err, posts) {
+						categories.getRecentReplies(category.cid, parseInt(category.numRecentTopics, 10), function (err, posts) {
 							category.posts = posts;
-							category.post_count = posts.length > 2 ? 2 : posts.length;
+							category.post_count = posts.length > 2 ? 2 : posts.length; // this was a hack to make metro work back in the day, post_count should just = length
 							callback(null);
 						});
 					}