Description:
------------
If a function does not exist I get a Fatal Error:

   "PHP Fatal error:  Function 'createUser2' doesn't exist in ..."

This is suboptimal as I cannot handle this with neither try/catch nor a custom error handler.

Test script:
---------------
<?php
$client = new SoapClient(...any PHP SOAP server...);
$client->doesNotExist();

...

<?php
$server = new SoapSever(...);
$server->handle();

Expected result:
----------------
handle() should either raise an Exception or at least a normal PHP_ERROR that's catchable using a custom error handler.

Actual result:
--------------
PHP dies and Apache terminates the SOAP connection without returning a proper SOAP Fault.