From 80b6384d9471e26af1a10754c6f8ddbdb926845b Mon Sep 17 00:00:00 2001
From: Joachim Breitner <mail@joachim-breitner.de>
Date: Tue, 6 Jan 2009 20:20:26 +0100
Subject: Fix possible head []

This seems to be a rare case, but I just got hit by it.

darcs-hash:20090106192026-23c07-28a0137e2fed8c9923e6b7c49bc9407deaaccd5e
---
 XMonad/ManageHook.hs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/XMonad/ManageHook.hs b/XMonad/ManageHook.hs
index a0b7bb4..ac528c1 100644
--- a/XMonad/ManageHook.hs
+++ b/XMonad/ManageHook.hs
@@ -71,7 +71,8 @@ title = ask >>= \w -> liftX $ do
         getProp =
             (internAtom d "_NET_WM_NAME" False >>= getTextProperty d w)
                 `catch` \_ -> getTextProperty d w wM_NAME
-        extract = fmap head . wcTextPropertyToTextList d
+        extract prop = do l <- wcTextPropertyToTextList d prop
+		          return $ if null l then "" else head l
     io $ bracket getProp (xFree . tp_value) extract `catch` \_ -> return ""
 
 -- | Return the application name.
-- 
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