altoslib: Check for negative tick wrap when importing flight records

altoslib: Check for negative tick wrap when importing flight records

If the tick count wraps just as boost is detected, there may be some
data records on the device with large tick values which are recorded
after the AO_FLIGHT record. Check for these in two places which manage
16-bit tick values by wrapping tick values to negative numbers in
those cases.

Signed-off-by: Keith Packard <keithp@keithp.com>