fix: [eviz-recorder] 修复对已经解绑的摄像头的事件合并

ils_common_video/eviz_video/merger.py

@@ -112,7 +112,7 @@ def merger_events(camera_code, files):
         log.exception(e)
         return
 
-    if not camera:
+    if not camera or camera.get('biz_type') is None:
         log.warning('摄像头%s已经被删除，将删除该摄像头的所有视频！', camera_code)
         for video_file in all_pre_files:
             if os.path.isfile(video_file.full_path):