Fix template crash on pull requests in the repo dashboard

pkg/template/pages/repo_dashboard.html

@@ -33,7 +33,7 @@
 							<a href="/{{$repo.Slug}}/commit/{{.Hash}}">{{.HashShort}}</a>
 							<small class="timeago" title="{{.CreatedString}}"></small>
 							{{ if .PullRequest }}
-								<p>opened pull request <a href="/{{.Slug}}/commit/{{.Hash}}"># {{.PullRequest}}</a></p>
+								<p>opened pull request <a href="/{{$repo.Slug}}/commit/{{.Hash}}"># {{.PullRequest}}</a></p>
 							{{ else }}
 								<p>{{.Message}} &nbsp;</p>
 							{{ end }}
@@ -78,4 +78,4 @@
            $(".btn-refresh").show().removeClass("hide");
         };
   </script>
-{{ end }}
+{{ end }}