[FIX] Since smarty 3.1 error_reporting is not respected by Smarty once there is a custom error handler and this is to prevent all smarty errors and warnings from being logged or displayed

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@48345 b456876b-0849-0410-b77d-98878d47e9d5