fix pageCount calculation

public/src/client/topic/posts.js

@@ -68,7 +68,7 @@ define('forum/topic/posts', [
 
 		var posts = data.posts;
 
-		ajaxify.data.pagination.pageCount = Math.max(1, Math.ceil((posts[0].topic.postcount - 1) / config.postsPerPage));
+		ajaxify.data.pagination.pageCount = Math.max(1, Math.ceil(posts[0].topic.postcount / config.postsPerPage));
 		var direction = config.topicPostSort === 'oldest_to_newest' || config.topicPostSort === 'most_votes' ? 1 : -1;
 
 		var isPostVisible = (ajaxify.data.pagination.currentPage === ajaxify.data.pagination.pageCount && direction === 1) ||

src/controllers/topics.js

@@ -387,7 +387,7 @@ topicsController.pagination = function (req, res, callback) {
 		}
 
 		var postCount = parseInt(results.topic.postcount, 10);
-		var pageCount = Math.max(1, Math.ceil((postCount - 1) / results.settings.postsPerPage));
+		var pageCount = Math.max(1, Math.ceil(postCount / results.settings.postsPerPage));
 
 		var paginationData = pagination.create(currentPage, pageCount);
 		paginationData.rel.forEach(function (rel) {

src/topics.js

@@ -52,7 +52,7 @@ Topics.getPageCount = function (tid, uid, callback) {
 			user.getSettings(uid, next);
 		},
 		function (settings, next) {
-			next(null, Math.ceil((parseInt(postCount, 10) - 1) / settings.postsPerPage));
+			next(null, Math.ceil(parseInt(postCount, 10) / settings.postsPerPage));
 		},
 	], callback);
 };