[examples] Fix the httpd.pir 404 handler. Trying to open a nonexistent file results in a EXCEPTION_PIO_ERROR exception which needed to be caught.
[examples] Fix the httpd.pir 404 handler.
Trying to open a nonexistent file results in a EXCEPTION_PIO_ERROR exception which needed to be caught.

git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@37709 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot