Some problems may cause series code cannot be compiled.

[chzhangudel]

Dr. Ma and Dr Derakhti, I found in the following subroutines some parts of code are supposed to be defined in parallel.

1. subroutine focused_wave_left_boundary: myid is defined in series code.
2. subroutine RandomU: myid is used in getting U,V W.
3. subroutine les_dyn(ISTEP): phi_3D_exch is called in series code.
   I can fix the first and third ones, but I dont know how to modify the second one.
   Could you please fix it?

Cheng