Kalman filter mex: remove compilation warnings
Compilation wargnings were pointing at: (i) some supposedly uninitialized variables (-Wmaybe-uninitialized); (ii) a pointer assignment (=) to a non-pointer target (-Wsurprising).
Compilation wargnings were pointing at: (i) some supposedly uninitialized variables (-Wmaybe-uninitialized); (ii) a pointer assignment (=) to a non-pointer target (-Wsurprising).