game.models.util: fix for immutable error.

diff --git a/extra/game/models/util/util.factor b/extra/game/models/util/util.factor
index cf43e69451df2474f2f39121a6d85b0d241d2a34..da32c6bca225568e82b86c5e976430bfff0a7f96 100644 (file)
--- a/extra/game/models/util/util.factor
+++ b/extra/game/models/util/util.factor
@@ -16,7 +16,7 @@ M:: indexed-seq set-nth ( elt n seq -- )
     seq dseq>>   :> dseq
     seq iseq>>   :> iseq
     seq rassoc>> :> rassoc
-    seq length n = not [ seq immutable ] when
+    seq length n = not [ elt n seq immutable ] when
     elt rassoc at
     [
         iseq push