From e621b21c883f453f93b4e9f8790ae43d8cd0f12e Mon Sep 17 00:00:00 2001
From: thefiddler <stapostol@gmail.com>
Date: Tue, 23 Sep 2014 08:55:02 +0200
Subject: [PATCH] [Win] Avoid NRE in WinFactory.Dispose()

WinFactory.Dispose() could crash with a NRE when the joystick driver has
not been initialized. Fixed by checking for null before disposing the
input driver.
---
 Source/OpenTK/Platform/Windows/WinFactory.cs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Source/OpenTK/Platform/Windows/WinFactory.cs b/Source/OpenTK/Platform/Windows/WinFactory.cs
index d09b4de2..6f57024e 100644
--- a/Source/OpenTK/Platform/Windows/WinFactory.cs
+++ b/Source/OpenTK/Platform/Windows/WinFactory.cs
@@ -163,7 +163,12 @@ namespace OpenTK.Platform.Windows
             {
                 if (manual)
                 {
-                    rawinput_driver.Dispose();
+                    WinRawInput raw = rawinput_driver;
+                    if (raw != null)
+                    {
+                        raw.Dispose();
+                        rawinput_driver = null;
+                    }
                 }
 
                 base.Dispose(manual);