fixed envvar test

git-svn-id: https://subversion.switch.ch/svn/shibboleth/java-idp/trunk@307 ab3bd59b-922f-494d-bb5f-6f0a3c29deca

diff --git a/bin/ArpUtil b/bin/ArpUtil
index 091ba91..2862fcf 100755 (executable)
--- a/bin/ArpUtil
+++ b/bin/ArpUtil
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 #The Shibboleth webapp root
-if [ -z SHIB_ROOT ]
+if [ -n SHIB_ROOT ]
        then
                SHIB_ROOT=/usr/local/tomcat/webapps/shibboleth
 fi