Make slightly more robost check for Index Data descripton 2, a=chris

diff --git a/src/library/IndexArchiveBundle.php b/src/library/IndexArchiveBundle.php
index 01e4c480a..1fd3c53c9 100644
--- a/src/library/IndexArchiveBundle.php
+++ b/src/library/IndexArchiveBundle.php
@@ -440,11 +440,13 @@ class IndexArchiveBundle implements CrawlConstants
             $info['DESCRIPTION'] = serialize($crawl);
             return $info;
         }
-        $info = WebArchiveBundle::getArchiveInfo($dir_name."/summaries");
-        if(isset($info['DESCRIPTION'])) {
-            return $info;
+        if (file_exists($dir_name . "/description.txt")) {
+            $info = WebArchiveBundle::getArchiveInfo($dir_name);
+            if(isset($info['DESCRIPTION'])) {
+                return $info;
+            }
         }
-        return WebArchiveBundle::getArchiveInfo($dir_name);
+        return WebArchiveBundle::getArchiveInfo($dir_name."/summaries");
     }
     /**
      * Sets the archive info (DESCRIPTION, COUNT,