Protect against things going wrong during access logging. An un-handled exception here could trigger some unexpected code paths.

      Possible contributing factor to https://issues.apache.org/bugzilla/show_bug.cgi?id=50957 ?
This is part of the fix for CVE-2011-1475

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1086352 13f79535-47bb-0310-9956-ffa450edef68