[hpsdr] HPSDR Programmer

[Berndt Josef Wulf]

G'day,

I spent some time debugging the HPSDR Programmer yesterday and cleaned up the 
interface discovery code. The problem was due to an interface indexing problem 
and I'm surprised this code worked at all. As I haven't received my Metis card 
as yet, I'm only able test the interface to the point of initiating and 
completing the discovery process, which I can confirm working on WinXP 32bits 
and Windows 64bit systems. Those interested in testing HPSDR Programmer on 
Windows 7 64bit systems may want to download the binary archive from 

http://www.ping.net.au/HPSDR_Programmer-20110302.zip

Other issues noticed but not followed up:

* unsafe use of type "long" and possibly other types
* comparison of unsigned with signed variables
* exception thrown by DiscoveryThread::stop() 

The exception was due to DiscoveryThread::stop() being called after failing to 
bind to the socket of a bad interface. This happened before making the changes 
to the discovery routing.  I haven't seen it since, but it may still be an 
issue and needs to be tested. 

73, Berndt
VK5ABN