CustomCategory: check that category can be parsed as object

src/customCategory.js

@@ -46,7 +46,11 @@ class CustomCategoryRepository {
           return global.alert(e)
         }
 
-        if (Object.is(data) && !('name' in data)) {
+        if (data && typeof data !== 'object') {
+          callback(new Error('Data can not be parsed into an object'))
+        }
+
+        if (!data.name) {
           data.name = 'Custom ' + id.substr(0, 6)
         }
 
@@ -358,6 +362,10 @@ function customCategoryTest (value) {
     return e
   }
 
+  if (!data || typeof data !== 'object') {
+    return new Error('Data can not be parsed into an object')
+  }
+
   const fields = ['feature', 'memberFeature']
   for (let i1 = 0; i1 < fields.length; i1++) {
     const k1 = fields[i1]