kiss-revdepends: Work even if package is uninstalled

contrib/kiss-revdepends

@@ -3,7 +3,7 @@
 
 # Ignore shellcheck as we want the warning's behavior.
 # shellcheck disable=2015
-[ "$1" ] && kiss l "${1:-null}" >/dev/null || {
+[ "$1" ] || {
     printf 'usage: kiss-revdepends [pkg]\n'
     exit 1
 }