From 4eb4d5154ca071cf4f395546d8be5568f2d8f682 Mon Sep 17 00:00:00 2001
From: Val Erastov <xibyte@gmail.com>
Date: Fri, 30 Nov 2018 00:11:19 -0800
Subject: [PATCH] fix revolve operation

---
 web/app/cad/craft/wizard/components/form/SingleEntity.jsx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/web/app/cad/craft/wizard/components/form/SingleEntity.jsx b/web/app/cad/craft/wizard/components/form/SingleEntity.jsx
index 0944e195..63601cfe 100644
--- a/web/app/cad/craft/wizard/components/form/SingleEntity.jsx
+++ b/web/app/cad/craft/wizard/components/form/SingleEntity.jsx
@@ -19,7 +19,7 @@ export default class SingleEntity extends React.Component {
   componentDidMount() {
     let {streams, entity, onChange, value, selectionIndex, findEntity} = this.props;
     let selection$ = streams.selection[entity];
-    if (findEntity(entity, value)) {
+    if (value && findEntity(entity, value)) {
       if (selectionIndex === 0) {
         selection$.next([value]);
       }