[BUG] Domotiga crash on remove of plugwise USB stick

[wwolkers]

I unplugged my Plugwise USB stick for some testing, and domotiga server crashed:

2010/11/27 13:25:36 [Plugwise] GetPowerInfo() didn't get expected answer for address '000D6F0000237228' result was ''
2010/11/27 13:25:36 [Plugwise] Is module plugged in and address correct?
2010/11/27 13:25:36 [Plugwise] Checking relay state of device 'plug3' with address 000D6F0000237228
2010/11/27 13:25:36 [Plugwise] MAC: 000D6F0000237228
2010/11/27 13:25:36 [Plugwise] String: 0023000D6F0000237228 CRC: 5EEB
2010/11/27 13:25:36 [Plugwise] Write: 0023000D6F00002372285EEB

2010/11/27 13:25:36 [Plugwise] GetDeviceInfo() didn't get expected answer.
2010/11/27 13:25:36 [Plugwise] Is module plugged in and address correct?
2010/11/27 13:27:09 [Plugwise] Checking power usage of device 'DomotiGa Server' with address 000D6F00002365FE
2010/11/27 13:27:09 [Plugwise] Calibration Request
2010/11/27 13:27:09 [Plugwise] MAC: 000D6F00002365FE
2010/11/27 13:27:09 [Plugwise] String: 0026000D6F00002365FE CRC: 9502
2010/11/27 13:27:09 [Plugwise] Write: 0026000D6F00002365FE9502

CPlugwise.Send.392: #48: Write error
0: CPlugwise.Send.392
1: CPlugwise.GetPowerInfo.242
2: CPlugwise.CheckPlugs.136
3: CPlugwise.tPlugwise_Timer.91

[RDNZL]

I added a check for writing to revision 496
http://www.domotiga.nl/changeset/496

So it shouldn't stop working anymore, just an display error.