%N uvvarini %F $MIR/src/subs/uvio.c
%D Retrieve a handle for the "uvVar" routines.
%P rjs
%: uv-i/o
%B
FORTRAN call sequence:
        subroutine uvvarini(tno,vhan)

  This routine allocates a handle for the uvVar routines. These routines
  are used to keep track of changes to variables, and to copy them when
  a change occurs.

  Input:
    tno         The handle of the uv data file.
  Output:
    vhan        Handle of the list of variables.                        
