appdetails: don't error on missing changelog

Author: vgmoose

src/AppDetails.js

@@ -36,7 +36,7 @@ class AppDetails extends Component {
     this.pkg[d] = this.pkg[d] ? this.pkg[d].replace(/(\b(https?|ftp|file):\/\/[-A-Z0-9+&@#/%?=~_|!:,.;]*[-A-Z0-9+&@#/%=~_|])/ig, '<a href="$&" target="_blank">$&</a>') : this.pkg[d];
 
     const clog = "changelog";
-    this.pkg[clog] = this.pkg[clog] ? this.pkg[clog].replace(/\\n/g, '\n') : this.pkg[clog];
+    this.pkg[clog] = this.pkg[clog] ? this.pkg[clog].replace(/\\n/g, '\n') : "n/a";
     this.pkg[clog] = this.pkg[clog] ? this.pkg[clog].replace(/(\b(https?|ftp|file):\/\/[-A-Z0-9+&@#/%?=~_|!:,.;]*[-A-Z0-9+&@#/%=~_|])/ig, '<a href="$&" target="_blank">$&</a>') : this.pkg[clog];
 
     this.setState({