[madwimax] madwimax-0.1.1 patch for FreeBSD 8 (very buggy)

[Maxim Giryaev]

I create similar patch, you can see it here: 
http://code.google.com/p/madwimax/issues/detail?id=39
Periodical crashes in libusb triggered by sigchild handler in madwimax.
I check to way to fix it:
1. remove sigchild handler and call wait3() in scan_loop()
2. check for NULL result of  libusb20_tr_get_priv_sc1() inside  lubusb.

Second way fixes crashes but periodically  libusb_submit_trasfer() 
returns error 99.

There are no disconnects from Internet on my router during last week.

-- 

Maxim Giryaev