Vanilla Forums - Fix challenge discussion validation

Author: luizrrodrigues

src/shared/components/challenge-detail/Header/TabSelector/index.jsx

@@ -36,7 +36,7 @@ export default function ChallengeViewSelector(props) {
 
   const numOfSub = numOfSubmissions + (numOfCheckpointSubmissions || 0);
   const forumId = _.get(challenge, 'legacy.forumId') || 0;
-  const discuss = (_.get(challenge, 'discussions') || 0).filter(d => (
+  const discuss = _.get(challenge, 'discussions', []).filter(d => (
     d.type === 'challenge' && !_.isEmpty(d.url)
   ));
   const roles = _.get(challenge, 'userDetails.roles') || [];

src/shared/components/challenge-detail/Specification/index.jsx

@@ -76,7 +76,7 @@ export default function ChallengeDetailsView(props) {
     codeRepo = codeRepoData.value;
   }
 
-  const discuss = (_.get(challenge, 'discussions') || 0).filter(d => (
+  const discuss = _.get(challenge, 'discussions', []).filter(d => (
     d.type === 'challenge' && !_.isEmpty(d.url)
   ));