修正播放窗口关闭时销毁播放器的代码

web_src/src/components/gb28181/devicePlayer.vue

@@ -306,7 +306,7 @@ export default {
         },
         close: function () {
             console.log('关闭视频');
-            if (this.$refs.videoPlayer){
+            if (!!this.$refs.videoPlayer){
               this.$refs.videoPlayer.pause();
             }
             this.videoUrl = '';