cdunalias: improve test for undefined alias.HEADmaster

* cdlog.sh (cdlog.unalias); Improve the test for
undefined alias, which is wrongly treating empty
as undefined.

1 files changed, 1 insertions, 1 deletions

diff --git a/cdlog.sh b/cdlog.sh
index feebfda..2721550 100644
--- a/cdlog.sh
+++ b/cdlog.sh
@@ -503,7 +503,7 @@ cdlog.unalias()
   local alias
 
   for alias in "$@"; do
-    if [ -n "${cdlog_alias[$alias]-}" ]; then
+    if [ "${cdlog_alias[$alias]+y}" == y ]; then
       unset cdlog_alias[$alias]
     else
       printf "no such cdlog alias: %s\n" "$alias"