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

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

@@ -22,6 +22,7 @@ Do {
 		Foreach ($VM in $VMLIST) {
 			$VMI = Get-VM $VM
 			if ($VMI -eq $null -Or $VMI.PowerState -match 'PoweredOn') {
+				$poff = 'no'
 				break
 			} else {
 		        $poff = 'yes'