[BRLTTY] USB support on Active Braille

[Lars Bjørndal]

With recent svn versions of BRLTTY, there is something horrible wrong
with the USB support on Handy Tech Active Braille. The braille display
isn't updated unless you press a key on the display itself. So if brltty
is started and you type something at the command line prompt, the typed
text isn't on the display untill you press a key on the display.

I have firmware version 2.1, which is an unofficial version.

Thanks and regards,

Lars