Windows: Ignore any device interface GUIDs beyond the first

The NZXT Kraken Z73 device has been reported to brokenly have two
identical device interface GUIDs registered. Accept such cases by
treating the ERROR_MORE_DATA return value as success and processing the
first returned GUID as if it would be the only one.

If one day we see legitimate cases of multiple GUIDs we will need to
deal with them properly.

References jdkvision/libusb#1
Closes #1010

Signed-off-by: Tormod Volden <debian.tormod@gmail.com>