Add support for Fujitsu Siemens Scaleo E lcd

The Fujitsu Siemens Scaleo E HTPC has a dm140 lcd with a different USB vendor/device id than currently supported by the dm140 driver, so add support for this "new" USB device id.

Function Compare didn't work with USB vendor/device ids >= 2^15 (ie 0x925d) because the value read from the string was not converted to a signed short.

These problems have previously been mentioned here: 
http://www.mythtv.org/wiki/futaba

![Fujitsu Siemens Scaleo E with working lcd](https://cloud.githubusercontent.com/assets/4707486/5559935/4517493c-8d64-11e4-8844-b1ae55ce4ed8.jpg)