amend the error when there is no maybe-like module

@@ -8,12 +8,22 @@ var $ = require('jquery'),
     Mustache = require('mustache'),
     lazyLoad = require('./lazyload');
 
+var $maybeLike = $('.maybe-like:last');
+
+// 无可能喜欢模块时直接返回
+if ($maybeLike.length === 0) {
+    return;
+}
+
 var winH = $(window).height(),
     loading = false,
     end = false,
     page = 1,
     tpl;
 
+var $goodList = $maybeLike.children('.goods-list'),
+    mblTop = $maybeLike.offset().top; //页面内容固定，可以预先求出高度
+
 //read good-info template
 $.get('/common/goodinfo', function(data) {
     tpl = '{{# goods}}' + data + '{{/ goods}}';
@@ -54,9 +64,6 @@ $('.goods-list').delegate('.good-islike', 'touchstart', function(e) {
     }
 });
 
-var $maybeLike = $('.maybe-like:last'),
-    $goodList = $maybeLike.children('.goods-list'),
-    mblTop = $maybeLike.offset().top; //页面内容固定，可以预先求出高度
 
 //srcoll to load more
 $(window).scroll(function() {