Correct bad context path when doing pattern search inside a repository

Summary:
Ref PHI101. It looks like this was maybe copy/pasted by mistake in recent design refactoring.

We need to pass the full path, not the `basename()` of the path, to the search form.

Test Plan: Searched inside `scripts/test/`, found results inside `scripts/test/`.

Reviewers: amckinley

Reviewed By: amckinley

Differential Revision: https://secure.phabricator.com/D18664

src/applications/diffusion/controller/DiffusionBrowseController.php

@@ -1557,7 +1557,8 @@ final class DiffusionBrowseController extends DiffusionController {
 
     $commit_tag = $this->renderCommitHashTag($drequest);
 
-    $path = nonempty(basename($drequest->getPath()), '/');
+    $path = nonempty($drequest->getPath(), '/');
+
     $search = $this->renderSearchForm($path);
 
     $header = id(new PHUIHeaderView())