Update iscsi-sys-vm-shutdown-verify.ps1

esxi-scripts/iscsi-sys-vm-shutdown-verify.ps1

@@ -16,7 +16,7 @@ $ESXI = Connect-VIServer -Server $args[0] -Protocol https -User $ESXiUsername -P
 Do {
 	$VMLIST = Get-Datastore | Where {$_.Name -like '*iSCSI-SYS*'} | Get-VM
 	write-host $VMLIST
-	if ($VMLIST -ne '') {
+	if ($VMLIST -ne $null) {
 		write-host "cycling through iscsi vms found"
 		$poff = 'no'
 		Foreach ($VM in $VMLIST) {