handle case of 'repo notification'

Author: silverwind

templates/user/notification/notification_div.tmpl

@@ -38,7 +38,11 @@
 					{{range $notification := .Notifications}}
 						<div class="notifications-item gt-df gt-ac gt-fw gt-gap-3 gt-p-3" id="notification_{{.ID}}" data-status="{{.Status}}">
 							<div class="notifications-icon gt-ml-3 gt-mr-2 gt-self-start gt-mt-2">
-								{{template "shared/issueicon" .Issue}}
+								{{if .Issue}}
+									{{template "shared/issueicon" .Issue}}
+								{{else}}
+									{{svg "octicon-repo" 16 "text grey"}}
+								{{end}}
 							</div>
 							<a class="notifications-link gt-df gt-f1 gt-fc silenced" href="{{.Link}}">
 								<div class="notifications-top-row gt-font-13">