[daip] cl2hf

[Eric Greisen]

Leonia Kogan writes:

 > >DATUTC is defined as REAL, while in fact it should be
 > >defined as DOUBLE PRECISION.
 > 
 > I do not think this is right.
 > 
 > DATUTC is output of the subroutine ANTINI and it is determined there as REAL.
 > DATUTC is also determined inside of DANT.INC as REAL

There were 2 problems:

1. ANTINI in READ did not update its pointer properly so the DATUTC
   returned was wrong (= UT1UTC)

2. CL2HF did not consider that all header keywords may be (are now)
   double precision as stored on disk.  The table routine needed to
   respond to the type returned and do appropriate things for a REAL
   or a DOUBLE, whichever was found.

I have fixed these and the MNJ will update.