They were mostly the same, I only had to keep the original
version of Poll() because while the differences are very small,
I don't think that unifying them is possible without needlessly
complicating things.
For this to work I had to make the private fields of HIDComposite
protected instead. I took the "+1" in HIDInterface::epIndex[]
from the original HIDUniversal class.
If a connected device has more than 3 (maxHidInterfaces) HID interfaces,
which is not unusual with modern keyboards, EndpointXtract() wrote
beyond the hidInterfaces[] array and corrupted bHasReportId, PID + VID.
The same could happen with the epInfo[] array.
Now this is fixed by checking bNumIface/bNMumEP before adding new
elements to those arrays.
