[util-iso-boot] Proper last commit

- actually define boot value as it was only locally defined in another function
- see also: https://github.com/manjaro/manjaro-syslinux-theme/issues/1

lib/util-iso-boot.sh

@@ -108,6 +108,7 @@ prepare_efi_loader(){
 }
 
 check_syslinux_select(){
+    local boot=$2/${iso_name}/boot
     if [[ ! -f ${boot}/x86_64/vmlinuz ]] ; then
         msg2 "Configuring syslinux for i686 architecture only ..."
         sed -e "s/select.cfg/i686_inc.cfg/g" -i "$1/miso.cfg"