Warning 16: uncalled segment, I used search ...

I tried to build a little initialisation function for a robot I'm building. Then warning 16 occured, I've tried searching this site, and tried the sollutions I coulf find. It seems to me it is not a problem of the function not being called?

void initialise(void){
  short failed = FALSE;
  [...]

  // initialise motors
  failed |= initMotor();
  [...]
}

initMotors is declared in motor.h and implemented in motor.c

short initMotor(void);

short initMotor(void){
  short failed = FALSE;

  if (DEBUG) printf("Initialising Motors\n");

  return failed;
}

When I try to build my project, it says:
Warning 16: Uncalled segment, ignored for overlay process
Segment: ?CO?MOTOR

Any ideas on why the warning could be generated? It's only a warning ... but I don't even want those (preferebly).