fix bug

apps/course/Tpl/default/Video/view_w3g.html

@@ -51,7 +51,7 @@
 					<div @click="onTapCourse(child, item)" v-for="(child, idx) in item.child" :key="idx" class="course_each layout_v">
 						<div class="layout_h" style="margin-left: 0.75rem;margin-right: 0.75rem;">
 							<van-icon size="16" :name="isVideoLocked(child) ? '__THEME__/img/locked.png' : '__THEME__/img/unlocked.png'" ></van-icon>
-							<div @click="subVideo(child)" class="layout_v weight_full" style="margin-left: 0.5rem;">
+							<div @click="subVideo(item)" class="layout_v weight_full" style="margin-left: 0.5rem;">
 								<span class="text_14_400 color_333333">{{child.title}}</span>
 								<span class="text_12_400 color_999999" style="margin-top: 0.25rem;">{{child.duration}}</span>
 							</div>