Using the PID library from motorware library

I've been trying to use the pid module in the motorware library, but I've had a few issues. If I declare a pid handle as follows

PID_Handle currentPID;
currentPID = PID_init(currentPID, sizeof(PID_Obj));

sometimes the pid handle points to memory that I can't see in the debugger and therefore I cannot see the internal variables of the pid controller. I noticed however that if I use the following  syntax.

PID_Handle currentPID;
currentPID = malloc(sizeof(PID_Obj));
currentPID = PID_init(currentPID, sizeof(PID_Obj));

I am able to debug. Is this the correct way to initialize? I couldn't find any examples of this pid controller being used.