From c832623c80a9f7249cc6f5aaefa62748755b51eb Mon Sep 17 00:00:00 2001
From: Marcel Kapfer <opensource@mmk2410.org>
Date: Fri, 25 Aug 2017 08:07:21 +0200
Subject: [PATCH] fish: test if variable exists

---
 shells/fish/config.fish | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/shells/fish/config.fish b/shells/fish/config.fish
index eefd5a7..037880a 100644
--- a/shells/fish/config.fish
+++ b/shells/fish/config.fish
@@ -58,7 +58,7 @@ end
 
 # Attach the autoscreen screen session  if StumpWM is running
 # and it's not already in use.
-if test $DESKTOP_SESSION = "stumpwm"
+if test \( -n $DESKTOP_SESSION \) -a \( $DESKTOP_SESSION = "stumpwm" \)
         if screen -list | grep -q "No Sockets"
                 screen -dmS autoscreen
                 exec screen -r