Description:
------------
DIO seems to be limited to a baud rate of 38400. I need to 
connect to my USB device with a speed of 115200. If I try that 
now I get:
PHP Warning:  dio_tcsetattr(): invalid baud rate 115200

Reproduce code:
---------------
  $fd = dio_open('/dev/ttyUSB0', O_RDWR | O_NOCTTY | O_NONBLOCK);

  dio_fcntl($fd, F_SETFL, O_SYNC);

  dio_tcsetattr($fd, array(
    'baud' => 115200,
    'bits' => 8,
    'stop'  => 1,
    'parity' => 0
  )); 


Expected result:
----------------
The settings applied as stated in the code above.

Actual result:
--------------
php index.php

PHP Warning:  dio_tcsetattr(): invalid baud rate 115200 in 
/var/www/zwave/index.php on line 11