fix for

```
0|camera   | knexError----------------------------------- END
0|camera   | TypeError: Cannot read properties of undefined (reading 'forEach')
0|camera   |     at /home/Shinobi/libs/scheduler.js:11:18
0|camera   |     at /home/Shinobi/libs/database/utils.js:159:33
0|camera   |     at __node_internal_ (node:util:281:10)
0|camera   |     at processTicksAndRejections (node:internal/process/task_queues:83:21)
0|camera   | Uncaught Exception occured! Wed Jul 06 2022 03:58:06 GMT+0000 (Coordinated Universal Time)
```

libs/scheduler.js

@@ -8,10 +8,11 @@ module.exports = function(s,config,lang,app,io){
             columns: "*",
             table: "Schedules"
         },(err,rows) => {
-            rows.forEach(function(schedule){
+
+            rows && rows.forEach(function(schedule){
                 s.updateSchedule(schedule)
             })
-            if(callback)callback()
+            if(callback && typeof callback === 'function')callback()
         })
     }
     //update schedule