fix crash on first post closes #100

lib/persona.js

@@ -70,7 +70,7 @@ $(document).ready(function() {
 					$(window).one('action:taskbar.pushed', function(ev, data) {
 						updateChatCount(data.element);
 					});
-					
+
 				} else if (!data.element.hasClass('active')) {
 					updateChatCount(data.element);
 				}
@@ -121,8 +121,11 @@ $(document).ready(function() {
 
 	function setupPaginator() {
 		function appendPageNumber(ev, data) {
-			var el = data.after ? data.after : data.before,
-				page = Math.ceil((el.attr('data-index') - 1) / config.postsPerPage),
+			var el = data.after ? data.after : data.before;
+			if (!el) {
+				return;
+			}
+			var	page = Math.ceil((el.attr('data-index') - 1) / config.postsPerPage),
 				handle = $('<div class="page-number pointer">' + page + '</div>'),
 				shadow = $('<div class="shadow"></div>');
 
@@ -159,7 +162,7 @@ $(document).ready(function() {
 				var distance = ev.originalEvent.touches[0].clientX - originalX,
 					handlePos = parseInt(handle.css('left'), 10),
 					postWidth = handle.parents('[component="post"]').width();
-				
+
 				toPage = Math.ceil((handlePos + distance) / postWidth * ajaxify.data.pageCount);
 
 				if (toPage >= ajaxify.data.pageCount) {