Powershell script to copy master page to new site collection after upgrade

I have used this powershell script to  copy master page to new site collection after upgrade

$srcUrl = "http://<Source Site Url>"

$destUrl = "http://<Dest Site Url>"

$site = Get-SPSite $srcUrl

$topWeb = Get-SPWeb $site.Url

### Copy master page to the new site collection

$SourceWebURL = $destUrl

$SourceLibraryTitle = "Master Page Gallery" 

$DestinationLibraryTitle = $SourceLibraryTitle

$MasterPageTitle = "My.master"

$sWeb = Get-SPWeb $SourceWebURL

$sList = $sWeb.Lists | ? {$_.BaseType -eq "DocumentLibrary" -and $_.title -eq $SourceLibraryTitle}

$sItem = $sList.Items | ? {$_.Name -eq $MasterPageTitle}

$dList = $topWeb.Lists | ? {$_.BaseType -eq "DocumentLibrary" -and $_.title -eq $DestinationLibraryTitle}

if($sItem -eq $null)

{

write-host -ForegroundColor red "My.maser does not exist at web application root web"

}

else

{

$sBytes = $sItem.File.OpenBinary()

$dFile = $dList.RootFolder.Files.Add($sItem.Name, $sBytes, $true)

$AllFields = $sItem.Fields | ? {!($_.sealed)}

Write-Host -ForegroundColor green "Copying My master page to the new site collection"

foreach($Field in $AllFields)

{

    if($sItem.Properties[$Field.Title])

    {

        if(!($dFile.Properties[$Field.title]))

        {

            $dFile.AddProperty($Field.Title, $sItem.Properties[$Field.Title])

        }

        else

        {

            $dFile.Properties[$Field.Title] = $sItem.Properties[$Field.Title]

        }

    }

}

$dFile.Update()

if ($dFile.CheckOutType -ne "None")

    {

        $dFile.CheckIn("Automatically checked in by Powershell", "MajorCheckIn");

    }

    if ($dFile.Item.Versions[0].Level -ne "Published")

    {

        $dFile.Publish("Automatically published by Powershell");

    }

    if ($dFile.Item.ModerationInformation.Status -ne "Approved")

    {

        $dFile.Approve("Automatically approved by by Powershell");

    }

}

$sWeb.Dispose()

$topWeb.Dispose()

$site.Dispose()