libusb usb_set_altinterface bug

I think I've found a bug in usb_set_altinterface in rwo's libusb(.library)

It returns random values, although I think it is working correctly aside from that:

usb_set_altinterface returned 1775165179
usb_set_altinterface returned -1320707581
usb_set_altinterface returned 5194454


I've looked at the source for the stub and the library and it should return +1 or -1. Anybody here know more about this than me?

@Chris

That is certainly strange.

Since the source code is included have you tried recompiling it yourself?

No, but that might be worth a try.