patch #7710: usb_libusb: Check VID/PID before opening device
* usb_libusb.c (usbdev_open): Swap the sequence of verifying the
VID:PID, and opening the device.
git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk@1228 81a1dc3b-b13d-400b-aceb-764788c761c2