Added missing initialization after measuring simulation time. Removed limitation that only allowed subsystem time steps to have even multiples of mother system time step.
Added missing initialization after measuring simulation time. Removed limitation that only allowed subsystem time steps to have even multiples of mother system time step.

Hopsan/hopsan,Hopsan/hopsan,Hopsan/hopsan,Hopsan/hopsan,Hopsan/hopsan,Hopsan/hopsan