fix(simon): Check that the cfHips-notch is available before updating it

This notch is not available in Simone, which caused it to break under
certain configurations.

Fixes [#833](https://github.com/freesewing/freesewing.org/issues/833)

config/changelog.yaml

@@ -13,6 +13,9 @@ Unreleased:
       - Added backend calls for creating gists/issues on Github
     wahid:
       - Added the `square` hem style. Fixes [#672](https://github.com/freesewing/freesewing.org/issues/672)
+  Changed:
+    wahid:
+      - Hem radius can no longer be zero. Use teh `square` hem style for that
   Fixed:
     aaron:
       - Set missing option `brianFitCollar` to `false`
@@ -25,6 +28,7 @@ Unreleased:
       - Adding missing control point to front neck opening
     simon:
       - Set missing option `brianFitCollar` to `false`
+      - Don't assume the `chHips-notch` is available because it's not in Simone. Fixes [#833](https://github.com/freesewing/freesewing.org/issues/833)
     simone:
       - Set missing option `brianFitCollar` to `false`
     sven:

packages/simon/src/buttonholeplacket.js

@@ -1,6 +1,6 @@
 import { addButtonHoles } from './shared'
 
-export default part => {
+export default (part) => {
   let {
     utils,
     sa,
@@ -61,11 +61,7 @@ export default part => {
     .split(points.topInnerEdge)[0]
     .line(points.bottomInnerEdge)
 
-  paths.seam = paths.saBase
+  paths.seam = paths.saBase.clone().line(points.placketBottomEdge).close().attr('class', 'fabric')
-    .clone()
-    .line(points.placketBottomEdge)
-    .close()
-    .attr('class', 'fabric')
 
   // Complete pattern?
   if (complete) {
@@ -98,7 +94,9 @@ export default part => {
     // Notches
     snippets['cfArmhole-notch'].anchor.x = points.cfArmhole.x - fold * 2
     snippets['cfWaist-notch'].anchor.x = points.cfArmhole.x - fold * 2
-    snippets['cfHips-notch'].anchor.x = points.cfArmhole.x - fold * 2
+    // This notch is not available in Simone
+    if (typeof snippets['cfHips-notch'] !== 'undefined')
+      snippets['cfHips-notch'].anchor.x = points.cfArmhole.x - fold * 2
 
     // Buttons
     addButtonHoles(part, 'placketCfNeck')