From 0e44cae1e30d8b05e17d7b3e93e680ac1adfb6ee Mon Sep 17 00:00:00 2001
From: Yeechan Lu <wz.bluesnow@gmail.com>
Date: Tue, 28 Jan 2014 21:23:50 +0800
Subject: [PATCH] Fixed: Calling null callback "hookedKeyboardCallback"

---
 WinAlfred/Helper/KeyboardListener.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/WinAlfred/Helper/KeyboardListener.cs b/WinAlfred/Helper/KeyboardListener.cs
index 01a9e1c02..264e6a8be 100644
--- a/WinAlfred/Helper/KeyboardListener.cs
+++ b/WinAlfred/Helper/KeyboardListener.cs
@@ -101,7 +101,8 @@ namespace WinAlfred.Helper
                     wParam.ToUInt32() == (int)KeyEvent.WM_SYSKEYDOWN ||
                     wParam.ToUInt32() == (int)KeyEvent.WM_SYSKEYUP)
                 {
-                    continues = hookedKeyboardCallback((KeyEvent)wParam.ToUInt32(), Marshal.ReadInt32(lParam), CheckModifiers());
+                    if (hookedKeyboardCallback != null)
+                        continues = hookedKeyboardCallback((KeyEvent)wParam.ToUInt32(), Marshal.ReadInt32(lParam), CheckModifiers());
                 }
             }