Approval return empty string if no choice

Author: bonustrack

src/voting/approval.ts

@@ -34,6 +34,7 @@ export default class ApprovalVoting {
   }
 
   getChoiceString() {
+    if (!this.selected) return '';
     return this.proposal.choices
       .filter((choice, i) => this.selected.includes(i + 1))
       .join(', ');