fixed undefined file extension on asset preview

react/components/AssetPreview/index.js

@@ -1,5 +1,5 @@
 import React from 'react';
-import { Link } from 'react-router-dom'
+import { Link } from 'react-router-dom';
 
 const AssetPreview = ({ name, claimId, fileExt, contentType }) => {
   const directSourceLink = `${claimId}/${name}.${fileExt}`;

react/components/ChannelClaimsDisplay/index.js

@@ -57,6 +57,7 @@ class ChannelClaimsDisplay extends React.Component {
               {this.state.claims.map((claim, index) => <AssetPreview
                 name={claim.name}
                 claimId={claim.claimId}
+                fileExt={claim.fileExt}
                 contentType={claim.contentType}
                 key={index}
               />)}