adding some fixes for null pointers in tracking service to make head tracking worky for inmoov.
adding some fixes for null pointers in tracking service to make head tracking worky for inmoov.

MyRobotLab/myrobotlab,MyRobotLab/myrobotlab,MyRobotLab/myrobotlab,MyRobotLab/myrobotlab,MyRobotLab/myrobotlab,MyRobotLab/myrobotlab,MyRobotLab/myrobotlab