Merge "Add undefined check for project"
diff --git a/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view.js b/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view.js
index cbbddf8..aba094b 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view.js
+++ b/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view.js
@@ -341,6 +341,7 @@
   }
 
   _getProjectConfig(project) {
+    if (!project) return;
     return this.$.restAPI.getProjectConfig(project).then(
         config => {
           this._projectConfig = config;