Fix an issue where Ponder rename stories tried to render question bodies

Summary: Missing some `break;`, pretty sure this is causing the issue on `secure.phabricator.com`.

Test Plan: Will push.

Reviewers: chad, btrahan

Reviewed By: btrahan

CC: aran

Differential Revision: https://secure.phabricator.com/D7559

src/applications/ponder/storage/PonderQuestionTransaction.php

@@ -258,13 +258,16 @@ final class PonderQuestionTransaction
           return phutil_escape_html_newlines(
             phutil_utf8_shorten($question->getContent(), 128));
         }
+        break;
       case self::TYPE_ANSWERS:
         $answer = $this->getNewAnswerObject($story);
         if ($answer) {
           return phutil_escape_html_newlines(
             phutil_utf8_shorten($answer->getContent(), 128));
         }
+        break;
     }
+
     return parent::getBodyForFeed($story);
   }