From 7d6c89fcdb8ec1b42975f632da374ab61310a48d Mon Sep 17 00:00:00 2001
From: Robin Krom <robin@getgreenshot.org>
Date: Thu, 11 Sep 2014 19:19:12 +0000
Subject: [PATCH] Fix for the problem described here:
 https://sourceforge.net/p/greenshot/discussion/676082/thread/2962d1ac

---
 Greenshot/Helpers/CopyData.cs | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/Greenshot/Helpers/CopyData.cs b/Greenshot/Helpers/CopyData.cs
index 7a2243daf..f67c2ac8b 100644
--- a/Greenshot/Helpers/CopyData.cs
+++ b/Greenshot/Helpers/CopyData.cs
@@ -109,7 +109,7 @@ namespace Greenshot.Helpers {
 					BinaryFormatter b = new BinaryFormatter();
 					CopyDataObjectData cdo = (CopyDataObjectData) b.Deserialize(stream);
 					
-					if (channels.Contains(cdo.Channel)) {
+					if (channels != null && channels.Contains(cdo.Channel)) {
 						CopyDataReceivedEventArgs d = new CopyDataReceivedEventArgs(cdo.Channel, cdo.Data, cdo.Sent);
 						OnCopyDataReceived(d);
 						m.Result = (IntPtr) 1;
@@ -119,7 +119,9 @@ namespace Greenshot.Helpers {
 				// WM_DESTROY fires before OnHandleChanged and is
 				// a better place to ensure that we've cleared 
 				// everything up.
-				channels.OnHandleChange();
+				if (channels != null) {
+					channels.OnHandleChange();
+				}
 				base.OnHandleChange();
 			}
 			base.WndProc(ref m);
@@ -142,7 +144,9 @@ namespace Greenshot.Helpers {
 		/// </summary>
 		protected override void OnHandleChange () {
 			// need to clear up everything we had set.
-			channels.OnHandleChange();
+			if (channels != null) {
+				channels.OnHandleChange();
+			}
 			base.OnHandleChange();
 		}
 
@@ -164,7 +168,7 @@ namespace Greenshot.Helpers {
 		/// Clears up any resources associated with this object.
 		/// </summary>
 		protected virtual void Dispose(bool disposing) {
-			if (disposing) {
+			if (disposing && channels != null) {
 				channels.Clear();
 				channels = null;
 			}