undefined this.batches in restore

[totano]

when restoring a table the program crashes with this message

WARN: table [<table name>] will be overwritten.
Starting download. 6Kb remaining...
node_modules/aws-sdk/lib/request.js:31
            throw err;
            ^

TypeError: Cannot read property 'length' of undefined
    at DynamoRestore._checkTableReady (node_modules/dynamo-backup-to-s3/lib/dynamo-restore.js:284:28)
    at Request.<anonymous> (node_modules/aws-sdk/lib/request.js:364:18)
    at Request.callListeners (node_modules/aws-sdk/lib/sequential_executor.js:105:20)
    at Request.emit (node_modules/aws-sdk/lib/sequential_executor.js:77:10)
    at Request.emit (node_modules/aws-sdk/lib/request.js:683:14)
    at Request.transition (node_modules/aws-sdk/lib/request.js:22:10)
    at AcceptorStateMachine.runTo (node_modules/aws-sdk/lib/state_machine.js:14:12)
    at node_modules/aws-sdk/lib/state_machine.js:26:10
    at Request.<anonymous> (node_modules/aws-sdk/lib/request.js:38:9)
    at Request.<anonymous> (node_modules/aws-sdk/lib/request.js:685:12)

looking at the source code it appears to be a synchronization issue between the s3 file download and the restore batch start, which is happening before while the batches array is still undefined

as a workaround, I raised the timeout on dynamo-restore.js line 109 to 5000
setTimeout(dynamodb.describeTable.bind(dynamodb, { TableName: this.options.table }, this._checkTableReady.bind(this)), 1000);