From c64485adfd98eb3a9058c82f9cb782bf622503f6 Mon Sep 17 00:00:00 2001
From: Gabor Apati-Nagy <gabor.apati-nagy@citrix.com>
Date: Tue, 9 Sep 2014 15:46:26 +0100
Subject: [PATCH] CP-9365: XenCenter work for HVM linux support -Fixing issue
 found by the reviewer: null reference exception when the VM restarts

---
 XenAdmin/ConsoleView/VNCTabView.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/XenAdmin/ConsoleView/VNCTabView.cs b/XenAdmin/ConsoleView/VNCTabView.cs
index 8f016e801..948bc0e80 100644
--- a/XenAdmin/ConsoleView/VNCTabView.cs
+++ b/XenAdmin/ConsoleView/VNCTabView.cs
@@ -483,7 +483,8 @@ namespace XenAdmin.ConsoleView
                     this.guestMetrics.PropertyChanged -= guestMetrics_PropertyChanged; 
                 
                 this.guestMetrics = newGuestMetrics;
-                guestMetrics.PropertyChanged += guestMetrics_PropertyChanged;
+                if (this.guestMetrics != null)
+                    guestMetrics.PropertyChanged += guestMetrics_PropertyChanged;
 
                 EnableRDPIfCapable();
             }