[PATCH 1 of 5] Fixed warning on uninitialized var

[Wald Commits]

# HG changeset patch
# User Sascha Wilde <wilde at intevation.de>
# Date 1410964514 -7200
# Node ID 1110d0017bad68884b55785ff0b5eb7aaa400cd8
# Parent  cf154e1f687a903de85748873e3814fe35adbf40
Fixed warning on uninitialized var...

diff -r cf154e1f687a -r 1110d0017bad packaging/linux-installer.inc.in
--- a/packaging/linux-installer.inc.in	Wed Sep 17 15:06:03 2014 +0200
+++ b/packaging/linux-installer.inc.in	Wed Sep 17 16:35:14 2014 +0200
@@ -265,7 +265,7 @@
 
   # remove temporary directories:
   local -a temp_dirs
-  if [ "${lock_dir}" ]; then
+  if [ "${lock_dir:-}" ]; then
       # $lock_dir is generate by the shar
       temp_dirs+=("${instcfg[PREFIX]}/$lock_dir")
   fi