FIX: Importing descriptor definitions fails when descriptions are not provided.

src/ui/catalog/descriptor/DescriptorUpload.tsx

@@ -46,8 +46,8 @@ class DescriptorUpload extends React.Component<IDescriptorUpload, any> {
       for (let i = 0; i < c.length; i++) {
         const term: VocabularyTerm = new VocabularyTerm();
         term.code = c[i].trim();
-        term.title = t.length >= i ? t[i].trim() : c[i].trim();
-        term.description = d.length >= i ? d[i].trim() : null;
+        term.title = t.length > i ? t[i].trim() : c[i].trim();
+        term.description = d.length > i ? d[i].trim() : null;
 
         terms.push(term);
       }