add proper return value

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@14425 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

xCAT/postscripts/xcatclient

@@ -20,7 +20,7 @@ logger -t xcat -p local4.info "xcatclient call with -d. getting credentials and
 
 if [ ! -x /usr/bin/openssl ]; then #Unless we have openssl stup
    logger -t xcat -p local4.err "$0: /usr/bin/openssl is not executable"
-   exit 0
+   exit -1
 fi
 USEOPENSSLFORXCAT=1 #Declare 2.3 style SSL
 RETURNVAL=0