Speed up Kalman scores and SSM data generation when no def vars
Speed up Kalman scores and SSM data generation when no def vars

JuKa87/OpenMx,mhunter1/OpenMx,jpritikin/OpenMx,JuKa87/OpenMx,mhunter1/OpenMx,JuKa87/OpenMx,mhunter1/OpenMx,jpritikin/OpenMx,jpritikin/OpenMx,jpritikin/OpenMx,JuKa87/OpenMx,mhunter1/OpenMx,JuKa87/OpenMx,JuKa87/OpenMx,mhunter1/OpenMx,mhunter1/OpenMx,jpritikin/OpenMx,jpritikin/OpenMx