Unable to use ST24 receiver

[lipper-chengdu]

Bug report

Issue details
Unable to use ST24 receiver
I found a bug in the ST24 receiving and processing code. I will fix it

Version
ArduCopter V4.4.0-dev

Platform
[*] All
[ ] AntennaTracker
[ ] Copter
[ ] Plane
[ ] Rover
[ ] Submarine

Airframe type
What type of airframe (flying wing, glider, hex, Y6, octa etc)

Hardware type
Pixhawk
Logs
AP_RCProtocol_ST24.cpp

[peterbarker]

You fixed this!