fix: 修复课程详情页点击'学习按钮'可能出错的问题

learnOnline/apiService/CourseApi.js

@@ -104,6 +104,7 @@ const getCourseDetail = (id, sid, callback) => {
                 _homework.semester_id = res.data.semester_id
               }
               return {
+                type: __.type,
                 id: __.id,
                 cid: cur.course_id,
                 sid: cur.semester_id,

learnOnline/pages/learnSystem/courseContent/courseContent.js

@@ -149,7 +149,7 @@ Page({
           }
           for (let k = 0; k < children.length; k++) {
             const item = children[k]
-            if (!json.tabs1ChapterList.currentChapterId || item.vid === json.tabs1ChapterList.currentChapterId) {
+            if (item.type === 2 && (!json.tabs1ChapterList.currentChapterId || item.vid === json.tabs1ChapterList.currentChapterId)) {
               this.setData({ latestVideo: item })
               break
             }