add ok to is_main to return ok result while having ability to error

1 files changed, 1 insertions, 0 deletions

diff --git a/ack.kpl b/ack.kpl
index 2161836..a68e10c 100644
--- a/ack.kpl
+++ b/ack.kpl
@@ -29,4 +29,5 @@
          )
     }
     `value ack_string `sync (U64 $ args `get -2; U64 $ args `get -1)
+    `ok
 )