From feefac69264af7cd65f5567ee717ee7cd48b865d Mon Sep 17 00:00:00 2001
From: jmoenig <jens@moenig.org>
Date: Tue, 31 Mar 2020 16:00:41 +0200
Subject: [PATCH] fixed a type error

---
 src/blocks.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/blocks.js b/src/blocks.js
index 603d1899..2d5940fe 100644
--- a/src/blocks.js
+++ b/src/blocks.js
@@ -2028,7 +2028,9 @@ SyntaxElementMorph.prototype.fixLayout = function () {
                 part.bounds.setWidth(blockWidth - myself.edge - ico);
                 adjustMultiWidth = myself.corner + myself.edge;
             }
-            part.fixLoopLayout();
+            if (part.fixLoopLayout) { // not a multi-arg
+                part.fixLoopLayout();
+            }
         }
         if (part.slotSpec === '%cs') {
             part.inputs().forEach(function (slot) {