Don't link files with no rendering changeset in DiffusionCommitChangeTableView

Summary:
When directories are added (e.g., on the `hg` initial commit, "/" is added) we don't render any diff for them but try to link to it in the table of contents.

Possibly we should render a diff saying "this directory was added", but stop it from complaining for now.

Test Plan: Looked at several hg and git commits which add directories to verify this gives us generally sensible behvior.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Differential Revision: https://secure.phabricator.com/D3663

src/applications/diffusion/view/DiffusionCommitChangeTableView.php

@@ -54,6 +54,7 @@ final class DiffusionCommitChangeTableView extends DiffusionView {
         $path .= '/';
       }
 
+      if (isset($this->renderingReferences[$id])) {
         $path_column = javelin_render_tag(
           'a',
           array(
@@ -65,6 +66,9 @@ final class DiffusionCommitChangeTableView extends DiffusionView {
             'sigil' => 'differential-load',
           ),
           phutil_escape_html($path));
+      } else {
+        $path_column = phutil_escape_html($path);
+      }
 
       $rows[] = array(
         $this->linkHistory($change->getPath()),