minor, fix dns param

2017-07-29 15:23:31 +08:00 · 2017-07-29 15:23:31 +08:00 · a5c56c547d
parent a6a0495392
commit a5c56c547d
1 changed files with 1 additions and 1 deletions
--- a/acme.sh
+++ b/acme.sh
@ -5440,7 +5440,7 @@ _process() {
        ;;
      --dns)
        wvalue="dns"
-        if ! _startswith "$2" "-"; then
+        if [ "$2" ] && ! _startswith "$2" "-"; then
          wvalue="$2"
          shift
        fi